Bad TPS and IAC readings, which to check first?

[84GNwith87eng]

Idle:

TPS: .56
IAC: 50 +-3

If I adjust the TPS back down to .42 (where it was for a WHILE), will I have to re-adjust my IAC? At a cold start, I'm pulling 2000rpm's in idle until the car warms up. Hopefully just adjusting the TPS will resolve this, I'm guessing one of the two screws are loose?

 

[Jerryl]

..... If I adjust the TPS back down to .42 (where it was for a WHILE), will I have to re-adjust my IAC? .......

I am no expert,but this is how I do it.
When you change the TPS it will most likely effect the IAC.
When you change the IAC, it will effect the TPS.
You have the go "back and forth" and make sure they are both correct.
You also may want to re-set the ECM and drive it after resetting the TPS and IAC for a few miles. Then come back and re-check.

 

[Joe Cancer]

Get the car up to normal operating temp. Set IAC,then set TPS.

 

[84GNwith87eng]

I got the TPS down to .48-.50, still a little high, IAC counts went down to the low 40's...that was just a 5 min play before I went to work...will try more on my lunch break...

when adjusting the IAC, do you just turn the whole a certain way to adjust? If so, which way? Adjusting the TPS seems to be helping my IAC counts, so maybe I'll only have to play with the TPS

 

[TURBOV6]

The IAC counts sould be around 10-15.

To adjust the IAC you need to adjust it with the idle screw. Do this first then adjust the TPS.

The car has to be warmed up to do this.

 

[84GNwith87eng]

adjusted the TPS on my lunch break...TPS is back at .44 idle, and IAC is 28. Runs pretty smooth now, I think the TPS screws got loose somehow