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Repair guides and support for the first generation Chevy S-10 (4WD model T-10) Blazer, a mid-size SUV based on the S-10 pickup truck. Closely related to the GMC Jimmy.

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How come it won't start after it sits for awhile

97 blazer just bought had 4 days runs great no ticks knocks squeals. But after it sits over night or the 8 hours i work it has to be primed before it will start. I thought it was out of gas the first day cause I was told gauge wasn't correct. Only took $10 to fill it up that wasn't the problem the other. 2 other times started after just a couple primes. Last night tried starting it for almost 2 hours till the battery died and nothing went to pick it up this morning from work put cables on it because the battery was dead I primed it twice and it started right up no problem

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That sounds like a failing fuel pump and/or check valve allowing the fuel to run back into the tank

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I don't know a lot about cars unfortunately and I don't have the cash to take to shop, its all in the blazer how can I check that?

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@shawnrae You would need to check the fuel pressure to be sure. If you have a friend that has a pressure tester they would let you borrow you could use that. Replacing the pump yourself wouldn't be too hard and would save on labor costs, but I wouldn't want you to replace it and that not be it. So I can't say 100% that it's your pump, It could be a poor connection for example, but the fact that you have to prime it makes me strongly suspect that check valve.

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@shawnrae TRY THIS MY 97 ASTRO HAD THE SAME THIING,ITS A FUEL PUMP THAT DOESNT HOLD PRIME,SIMPLY TAKE THE KEYTURN IT BUT DONT START YETWAIT FOR THE FUEL PUMP TO STOP WHININGTHE TRUCK SHOULD START IT WORKED FOR ME AND ITS SIMPLE TILL THE PUMP GOES TOTALLY

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sorry about the all kaps kraziness

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