Help engine has a miss fire
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Freshman User
Joined: Jan 2006
Posts: 29
Likes: 0
Help engine has a miss fire
Help I put a new check valve and vacume switch on fuel filter. Because if the truck sat overnight it would lose it's prime and be a real bear to get started. I got that fixed but at idle the engine still has little missfire once about ever 5-10 seconds even though. I guess you could say it's a not a very pronounced miss you can still tell it is there. Any Idea's anyone? The truck has never had injector pump replaced or rebuilt in 200,000 miles. It has had the injectors rebuilt about 70,000 miles ago.
Last edited by 1970 Boss 302; Dec 15, 2007 at 03:05 PM. Reason: miss typed
Elder User
Joined: Mar 2006
Posts: 901
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From: North-Eastern, Ohio
While the engine is running, crack open the injector lines one by one. You should hear a slight drop in RPM's. The injector that didn't make an RPM change is the bad cylinder. Have a rag with you on this as to not get fuel everyday.
