View Single Post
Old 08-11-2014, 03:27 PM   #30
ChevyTech
Registered User
 
Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue

Quote:
Originally Posted by 76C10Stepside View Post
...
Questions:

How long should the ECM take to "relearn" and adjust the idle speed down?

Any suggestions on what to do next? I will not be driving it anywhere until I know I can trust it to keep running and not burn up.
It won't happen sitting in the driveway.

If I remember correctly one of the conditions for a self learn of the IAC position is a 45 MPH threashold must be met.

You can try this and see if it gets closer.
Using a watch or timer to make sure you hit the times on step 3 and 4:
1) Disconnect battery for at least ten seconds. (with the Key OFF)
2) Reconnect the battery.
3) Start engine letting it run for five seconds.
4) Turn key off for ten seconds.
5) Then start it and see how it idles.
__________________
For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
ChevyTech is offline   Reply With Quote