I have a 89 Truck 4x4 22RE 4x4
When motor is warmed up the Idleing Goes Up and Down
You can unplugs the TPS and it runs Find
Any one had this prolem??

 

My issue was the IACV (idle air control valve). My intake was cracked and was sucking in dirt. I removed the intake, and sprayed carb cleaner down the throttle body to clean it haha. It helped, and I didn't have to take anything off besides the intake.