I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
+
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
=== Update (03/08/24) ===
+
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
[image|3247553]
=== Update (03/12/24) ===
+
[image|3251504]
Swapped injector 1 to 2. Code moved.
=== Update (03/20/24) ===
+
And I'm back with yet another report. Sigh...
So I swapped the injector, and it had the same codes.
[image|3259133]
[image|3259134]
I swapped the replacement injector into Cylinder 3 (and put the good one in Cylinder 2), same codes
[image|3259131]
[image|3259132]
The only things I can see to try are the connector and if that doesn't work it looks like a PCM/ECU or engine failure.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
=== Update (03/08/24) ===
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
[image|3247553]
=== Update (03/12/24) ===
[image|3251504]
Swapped injector 1 to 2. Code moved.
=== Update (03/20/24) ===
And I'm back with yet another report. Sigh...
So I swapped the injector, and it had the same codes.
-
[image|3259133][image|3259134]
+
[image|3259133]
+
+
[image|3259134]
I swapped the replacement injector into Cylinder 3 (and put the good one in Cylinder 2), same codes
-
[image|3259131][image|3259132]
+
[image|3259131]
-
The only things I can see to try are the connector and if that doesn't work it looks like a PCM or engine failure.
+
[image|3259132]
+
+
The only things I can see to try are the connector and if that doesn't work it looks like a PCM/ECU or engine failure.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
=== Update (03/08/24) ===
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
[image|3247553]
=== Update (03/12/24) ===
[image|3251504]
Swapped injector 1 to 2. Code moved.
=== Update (03/20/24) ===
And I'm back with yet another report. Sigh...
So I swapped the injector, and it had the same codes.
-
Photo placeholder
+
[image|3259133][image|3259134]
I swapped the replacement injector into Cylinder 3 (and put the good one in Cylinder 2), same codes
-
+
[image|3259131][image|3259132]
The only things I can see to try are the connector and if that doesn't work it looks like a PCM or engine failure.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
-
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
=== Update (03/08/24) ===
-
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
[image|3247553]
=== Update (03/12/24) ===
-
[image|3251504]
Swapped injector 1 to 2. Code moved.
+
+
=== Update (03/20/24) ===
+
And I'm back with yet another report. Sigh...
+
+
So I swapped the injector, and it had the same codes.
+
+
Photo placeholder
+
+
I swapped the replacement injector into Cylinder 3 (and put the good one in Cylinder 2), same codes
+
+
+
+
The only things I can see to try are the connector and if that doesn't work it looks like a PCM or engine failure.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
+
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
=== Update (03/08/24) ===
+
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
-
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
-
***GAS TEST***
-
-
Yep, gas was fine at 10% ethanol.
-
-
[image|3252030]
-
-
***INJECTOR SWAP***
-
-
Swapped injectors to see if the code moved from 1 to 2, it moved and changed to a manufacturer code (it was Generic prior):
-
-
[image|3252031]
-
=== Update (03/08/24) ===
-
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
***GAS TEST***
Yep, gas was fine at 10% ethanol.
[image|3252030]
***INJECTOR SWAP***
Swapped injectors to see if the code moved from 1 to 2, it moved and changed to a manufacturer code (it was Generic prior):
[image|3252031]
=== Update (03/08/24) ===
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
+
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
***GAS TEST***
Yep, gas was fine at 10% ethanol.
[image|3252030]
***INJECTOR SWAP***
Swapped injectors to see if the code moved from 1 to 2, it moved and changed to a manufacturer code (it was Generic prior):
[image|3252031]
+
+
=== Update (03/08/24) ===
+
+
Update on the checks: Checked the gas, 10% ethanol. It's gotta go back under the microscope.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
***GAS TEST***
Yep, gas was fine at 10% ethanol.
[image|3252030]
***INJECTOR SWAP***
-
Swapped injectors to see if the code moves from 1 to 2, it moved:
+
Swapped injectors to see if the code moved from 1 to 2, it moved and changed to a manufacturer code (it was Generic prior):
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
-
-
***GAS TEST***
Yep, gas was fine at 10% ethanol.
[image|3252030]
+
+
***INJECTOR SWAP***
+
+
Swapped injectors to see if the code moves from 1 to 2, it moved:
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
-
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
+
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
-
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
+
In the meantime, I'm weary of the engine and based on those numbers and I do suspect the engine is potentially NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. The only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
-
** 200KPa differential. Not great.
+
** 100-200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
-
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
+
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most. A little deviation will happen with this many miles on anything, so nothing concerning.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
-
The first thing done was changing the spark plugs as a gamble. No fix, of course.
+
The first thing done was changing the spark plugs as a gamble. No fix, of course. Cylinders 3 and 4 also had a lot of oil on the spark plugs... More on that in the compression test numbers.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,350KPa
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
-
The only thing I have not checked is the ethanol, yet. That's next.
+
The only thing I have not checked is the ethanol and fuel injectors, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
-
* Cylinder 3: 1,250-1,340KPa
-
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
+
* Cylinder 3: 1,250-1,350KPa
+
** 100KPa differential, ick. It wouldn't be worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
-
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time.
+
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time. Only test I didn't check is the wet compression. I saw everything I had to see.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
-
The next thing I checked was the compression. This is where I begin to be leary of the engine...
+
The next thing I checked was the compression. This is where I begin to be leary of the engine. The other thing I noticed (but can't show, my borescope camera doesn't support image saves but cylinders 1, 3, and 4 have oil from bad rings; 3 and 4 being the worst, and also have the worst compression numbers.
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine...
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa on the 2nd test
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
-
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
+
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a generic Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine...
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine...
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
-
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline.
+
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline. I've even tested Cylinder 4 4 times, the others were baseline run and checked a 2nd time.
I have been looking at this 2011 Forte to see why it is running rough, and I suspect it's possibly a bad engine but just looking for a second opinion. Engine has 154k miles.
The first thing done was changing the spark plugs as a gamble. No fix, of course.
The first thing I checked for was codes about the problem. Regrettably, I forgot the code, but I saw a Cylinder 1 misfire code. To rule that out, I swapped coils, cleared the codes, and re-scanned. It's the same code on the same cylinder. I'm not too surprised being it uses Denso ignition coils.
The next thing I checked was the compression. This is where I begin to be leary of the engine...
[image|3245456]
* Cylinder 1 (left): 1,350KPa
* Cylinder 2: 1,325
** So far so good. Kia/Hyundai says there should be a 100KPa differential on this engine at most.
* Cylinder 3: 1,250-1,340KPa
** 100-120KPa differential, ick; but 20KPa isn't worrisome if isolated and it's fine, just a death sentence with Hyundai/Kia when it's worse.
* Cylinder 4: 1,100-1,300KPa, 1,200KPa mid pressure
** 200KPa differential. Not great.
Cylinder 4 is all over the place. Cylinder 3 is borderline at best.
The only thing I have not checked is the ethanol, yet. That's next.
In the meantime, I'm weary of the engine and based on those numbers, I suspect the engine is NFG given the inconsistencies with Cylinder 4 and Cylinder 3 being borderline.