1988 2.8 TPS adjustment

The past few week I noticed that the idle on my car was really high, about 2000rpm and the car would also hesitate on take off. So i checked the TPS adjustment and had to reset it to the right voltage. I figured this would work. It didn't still having the same problem. Any suggestions.

mm does it stay up there? @2KRPM? how about the charcoal canister.. try unplug that...i know my old 2.8 had trouble idling when the canister crapped out..

how about the throttle cable? is that too tight?

Have you tried changing the IAC (Idle Air Control) sensor? They're pretty cheap.

Have you tried changing the IAC (Idle Air Control) sensor? They're pretty cheap.

Unless it's reacting as should to a vacuum leak.