I just replaced my valve cover gasket on my 1996 2.2 liter Cavalier, and when I started the car and drove around for a couple minutes, I noticed a very bad misfiring. I remembered that my friend had the same problem. He reset his PCM and was fine. I reset my PCM and the misfiring went away too.

Why does replacing the valve cover gasket cause the PCM to need to be reset? Has anyone else experienced this?

Joshua

Wow, lol thats news to me.. The 2.2 I used to have didnt do that after I replaced my valve cover gasket a few times.. Hmm










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Wow ive replaced valve cover gasket's on two 2.2 cavaliers and had no probs


My car--->http://www.cardomain.com/ride/2569452

It may just be something weird for my car. I think my friend who told me the story about having to reset the PCM when he replaced his valve cover gasket was actually referring to my car. He owned the car before me and replaced the valve cover gasket on it.

I was wondering if it might in someway affect the ground (reference) voltage, screwing up the PCM? Who knows...

spark plugs in the right place?

kurtis hendrix wrote:spark plugs in the right place?

have you ever even looked under a hood?



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kurtis hendrix wrote:spark plugs in the right place?

I think (rather hope) he meant plug wire placement.


My car--->http://www.cardomain.com/ride/2569452

Spark plugs and wires are all right. All I did was replace the valve cover gasket, drive the car, observe bad misfiring, reset the PCM, and observe good running. It has been running well for a week now. I did not touch the ignition before or after the valve cover gasket replacement. It was some fluke with the valve cover / PCM... somehow they are connected.

Interesting...