I have a 91 TBird with the 5.0L HO engine and AOD. It suddenly developed = a high idle. I checked the linkage, nothing is binding or hanging up. I = even unhooked all the cables from the throttle body, made sure it was = closed and started it. High idle.
It idles about 2000 rpm. At first it would only idle high a few seconds = when you first started it up. Now it idles high, ALL the time.
I pulled apart a few wiring connectors and all the contacts look clean = on the idle air solenoid, TPS and maf sensor.
What could be wrong and how should I check it?
Dan S