Hello I have a 1991 olds cutlass with a 3.3l 6 cyl engine 77,000 miles. The engine idles fine, but when it rains it stumbles on acceleration. Any help is appreciated. This is a great car otherwise.

William

Could be bad plug wires look for cracks around the coil paks also.

I replaced the spark plug wires and spark plugs and no help. I was told it might be the dist. cap? All the sensors are tightly locked in place but that doesnt mean they couldnt be faulty. I would think it is electrical since moister seems to be the problem. Thanks for the replies. It is our family car..

William

There is no dist cap this is DIS system, you have a module and coil pak, try spraying some water on the coil pak at nite see if you see any arcing.

Hey thanks for the help. I will try that. I also read to spray the coil pack with water to check for arcing.