Having problems with your 1988 Ford Mustang ?
Idle problem Gotta love this car. lol. ok. ignition is now fixed. At odd times and especially if the AC is off the idle goes wild. it will try to stall and you can see it trying to adjust itself then it will go up to 1500 or 2000 rpm. if you shut the car off and then restart it will sometimes go back to where is is supposed to be at. any ideas. i am trying to clean the idle air control/throttle area but was worried it might be the computer
Clean the throttle valve and the airbypass as you said, but also clean the MAF, diconnect the battery for 5 minutes, then drive a day or so to reset idle settings, I doubt it is the PCM/ECM, worked for Ford dealer 20 years, never saw but 3 bad ECM's, and those engines did not run at all.
Repair Help & Product Troubleshooting for 1988 Ford Mustang
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