TBI with High Idle in PARK

[JJK10]

[QUOTE=dave w;83926]As a ballpark adjustment for the throttle blade opening, try adjusting the throttle blade opening by pulling a strip of paper about 1/2" wide x 4" long through the throttle blade opening. The paper strip should have a slight drag when pulled through the throttle blade opening.

Note, paper thicknesses will vary depending on the paper. I use a common 20 lb paper, not 16 lb (to thin) or 24 lb (to thick).

dave w

Thanks Dave, I will give that a try.... but I bet I will be 900+Rpm and IAC count 40+

[dave w]

After adjusting to paper thickness, reset TPS voltage = 0.55 volts

dave w

[JJK10]

Is it possible that this is the issue I'm having? Below is another members post!

So I finally figured out that the park/run IAC offset was too low and added a few steps. Now it idles at 765 regardless of gear selector position. I guess with it too low, the ECM was giving almost as much air in park/neutral as it was in drive, causing the park/neutral idle to be too high. I enjoy learning on my own, but sometimes a little bump in the right direction is helpful...
Please chime in if I'm misunderstanding how that offset was affecting things.

[JJK10]

Tried the paper trick, then reset the TPS with a VM and no change. Idle around 900 and IAC counts near 45.... anyone have any ideas. Thank you