What’s the right way to replaced the spark plugs?
I just replaced my spark plugs but spark plug number 7 has a miss fire even when it’s a new one
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@josephmarin could be your coil or could even be a bad fuel injector. Have your Suburban's OBDII scanned and let us know what code it gives you. We also need to know the exact year and engine size.
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@josephmarin just switch the coil from cylinder 7 to another cylinder and see if the error is now a misfiring on the cylinder that has that coil. If so, you know it's the coil. Fairly straight forward.
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Have you tried swapping that plug with another one? I've broken plugs when putting them in.
If the problem stays the same, I'd look at the spark plug wires next. It's possible to damage them if you pull on the wire instead of the metal boot when removing them from the spark plug. Try swapping your #7 wire with another one and see if the problem moves. If it does, you're done; a new set of plug wires should fix you right up.
Of course, if the problem stays put, try swapping the coil for another and recheck. Again, if the problem moves you'll need to replace that coil.
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