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Dist. cap corroded, plug wire bad, spark plug fouled, pushrod bent, valve bent, and last but not least, head gasket.

Answeralso if you are misfiring on a cylinder your rocker arms my be to tight or not tight enough and youll know if the arent tight enough(they will rattle)

Answer The same thing happened to me, the cause is faulty intake manifold gaskets the slip down out of place allowing it to suck air in the top and oil in the bottom. If you check your plug it will be fowled black from oil consumption. I had new after market reinforced gaskets put in and the problem is resolved.

AnswerIf you engine light comes on and flashes it could be one of your injectors have a small hole in it and could cause a misfire

Answer

A defective fuel injector can also cause the problem

As for the second answer, i agree. My buddy who don't know much about engines rebuilt an engine and we couldn't figure out why it wouldn't start and after checking every possible thing we checked the rockers and he had them way too tight. loosened them up started right up.

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โˆ™ 2011-09-13 17:15:23
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Q: Why would a '98 Chevy Silverado be misfiring in cylinder five?
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