1999 catera misfire
160

Asked by mrkap Apr 10, 2012 at 10:24 AM about the 1999 Cadillac Catera

Question type: Maintenance & Repair

Hi I have a 1999 Catera and love it. I am having problems that are confusing me. The engine light is on and is riding rough in idol and on initial acceleration. I had a complete tune up and had the 1-3-5 panel changed so far. When we hook up the computer it tells us in idol the 1-3-5 cylinders are misfiring. But when you give her some gas the problem is gone.
I have taken her to a few mechanics and each has his own thoughts. I am not ready for these guys to start changing more stuff on my baby that is necessary. So far I got the timing belt and the Fuel Injector system as probable causes. Can someone please give me an idea of what it may be?

Thank you

Peter

3 Answers
1,555

Gordon answered 12 years ago

Its a Cadi, so I hope you're running premium through it. Try a complete fuel system clean, this will help eliminating the injectors if they are just dirty.

Mark helpful
2,005

mtmonarch answered 12 years ago

How many coils do you have?? It sounds like it could be a crack in one of the coils & it's arcing. With it running, try spraying some fabric softener like "Fabreeze" onto the coils, I know that sounds weird, but that will cause a visible arc/spark jump if there is a crack in one of the coils. My mechanic friend showed me that trick!

2 people found this helpful.
Mark helpful

Jteck52 answered 8 years ago

Probably timing belt jumped a tooth or 2, I work on alot of them , check for vacuum leaks , with car running spray brake clean on engine, if idle changes , repair vacuum leak, of course check for oil in spark plug tube under coil assembly

Mark helpful

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