'91 DeVille - I have noticed recently that when I restart the car after it has been turned off for about 30 minutes, it will idle up, then it will do way down, jump way up, then way down (almost stall), then back up, etc. It only does this on "hot" start-up. When I turn it off that little thing on the front of the motor "ratchets" back and forth. I think I was told this was the idle control valve or something? I wonder if that thing is going bad? Also my car is not idling as smooth as it should be. It has new injectors and plug wires. It has that knock I have mentioned. I would like to clean those EGR tubes, but not sure how, or if problem is related.
Any ideas?
Thanks!
Any ideas?
Thanks!