When its raining or after a car wash the car will idle rough. Won't idle rough in Park but any other gear it will. Just started this about a week ago.

Any thoughts?

 

It has a cai but I don't think that has anything to do with it since I've had that installed for a while now.

 

Does it run fine when it dries out?

 

Yeah it does

 

I spray all up underneath it, too. Always done that too my cars. I tried to find info on Google about it and all I came up with is spark plugs. Which, sadly enough, last time I had them changed was last summer.

 

None of the gauges act up either when its rough idling. Rpm stick doesn't act up either. It'll sputter a little when driving but not much or hardly noticable. just at idle.

 

Is this a V6 or V8 LT1. Give me the details on your car.

 

'97, v6 3.8

 

V6 I don't know, have to wait for one of the other guys to answer up on.

 

Check your wiring. Definitely a electro issue. Something is missing to let rain water in past the hood. Check from left to right slowly. Right now sounds like dnt have a short(yet) so concentrate around the sensor wiring, coil packs, plugs etc. If it got wet recently you should see it.