Replacing IAC valve did not help, but unplugging it drops rpms to almost nothing so that car is drivable. Now auto tranny won't shift but I assume that's because of idle issue. What's causing such a high idle? High idle issue started after rinsing off motor with garden hose. Used stream and soft spray to rinse off motor. Left to dry for a few hours, then started engine and problems started. Thank you.
It may have shorted out something if it is commanding full open
April, 29, 2012 AT 9:30 PM
New iac valve. Good idea about a possible short. Fuses all look good. What else do I check?
May, 1, 2012 AT 2:26 AM
Look for vacuum leaks. It would be a big one like the power brake booster hose or pcv line
May, 2, 2012 AT 12:13 AM
Hmm, lines and hoses aren't leaking. I reconnected IAC sensor and disconnected the Throttle Position Sensor on the throttle body, and it's running like a gem now. Possibly a short in that sensor was commanding it to run wide open just as you suggested. Will replace that sensor and go from there. Thank you for your help.