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

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...

Good Morning sgtbilkodle,
Could you go into more detail on how you corrected this issue? I've been having the same issue and everything I try doesn't help. Thank you, Jason

[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...

I would open the butterflies, cycle the key and then reset the TPS. I continued that until the counts were near 10, at that point the idle was worse.... ]If your throttle blades are "waaaaay open"...

Yes, its nearly closed. but the throttle blades are waaaaaay open. If I jumper the ALDL and turn the key on, I can pull the IAC plug when the plunger is at about 20 counts, then leave it unplugged...

Dave,
I followed your suggestion and got the IAC counts down around 6-9 and the TPS set very close to .55 but now the idle is 1100. I attached the log. :mad1::mad1::mad1:

Well removing the park input from the ECM did not change anything with regards to the HIGH idle in park. Check that off the list!!! any other thoughts on this? is it ok to install back into the loom?...

I'm going to look into the two codes and I will try removing the Park input from the ecm. The codes seem odd because no CEL ever came on... Thank again everyone and keep the thoughts coming! Keep...

Not sure if I did this correctly..... but I tried!

So today I installed a new IAC pigtail from the engine to the computer... Went through the TBI setup and with the IAC forced close and then unplugged the truck idles at 525. Plug it back in and...

Thanks everyone! I have no ability or skills to mess with the computer/tuning but aside from that I can handle the other stuff. In all fairness I have had three tuners attempt fixing this.... but to...

Yes still running the manual bin and unfortunately the issue is still there. I'm not sure what Tsat in there but remember this issue has ran through several different computers, different engine and...

Thanks Tayto... but that was confirmed long ago! this is much deeper than something that simple.

The wires are located correctly and seem to all Ohm correctly ….. I'm stumped

I double checked all this, the wiring is correct for a SBC. Thanks, Jason

Thank you Tayto
Yes the truck is still setup with TBI...The TB is not the issue, I have tried a few different setups. This is a real head scratcher I've tried everything except wiring harness...

HELP!
After nearly a year of working on and off on this HIGH idle in park.... its still there! I've tried different computers, different throttle bodies, different chips, different tuners and...

Thanks Dave!

Dave is working on it! but I cant help but think something in the wiring is causing this high idle.... had the same issue with the L05 engine I removed. Maybe if Dave gets time he can post my last...

Thanks everyone! I'm working with Old School Efi and I believe he is going to try to burn a Manual chip to see if that might bring the in PARK idle down. Any other ideas would be welcome! long story...

I'm sorry I missed up the Absolute pressure volts is .9 the TPS is .55... Thanks

Yes Sir! that's the direction I followed. it just idles up once you plug the IAC back in. Thanks

about .9 with the RPM at 825 and a BLM of 115 when I first put it in park after a long drive.... IAC count 44

You could be on to something! but I have no ability to check that... Thanks much for the input!