I'm Back! '90 GTUs

[project86]

Originally Posted by infernosg

There's a procedure for adjusting this screw in the FSM. IIRC, while idling and warmed up you have to ground one of the pins in the green check connector located elsewhere in the engine bay and then adjust the screw so the TPS voltage is within a certain range.

It wasn't the TPS I was messing with. That we got adjusted correctly a while ago. I'm referring to the "idle screw" on top of the throttle body/UIM.