I've got a Formula 350. I've done a lot to bring it back from the dead and the car runs great now. Except when I take it through a car wash... when I exit the car idles goofy and wants to die due to low idle. I'm stumped... anyone know what the problem could be?

 

either watert in the intake OR more likely - you're getting something wet that should stay dry. check dem plug wires

 

did you posibly remove the rear hood seal? If so, water prolly getting on something that it shouldnt (maybe distributor)

 

I did remove the rear plastic seal. When I wash the car with a standard wash it's fine. Its when I get the uder carrage spay something go's funny with the engine. Kind of like it's miss firing. Leaky spark plug maybe? I don't know... I'm gonna try looking under the car to see what the problem could be. Any other guesses???

 

well, whats towards the bottom of the engine? hmm, spark plugs, O2 sensor, uh... fan switch...I can think of anything that would mess your car up in that area...maybe water getting higher up into engine bay? I dunno...

 

Check to make sure your radiator cap is secure and not cracked.

 

i have a heated o2 sensor downstream and when it gets wet the car runs screwy.........doesnt happen in car wash tho so i just stopped driving in the rain.........wont hook up anyway