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Originally Posted by Fasterthanyou
Set the min idle with the IAC closed and the engine warmed up. When the engine is cold, the IAC is commanded to open more and won't let the motor stall. Setting it CAN be done with it running. Just hook up a scan tool and set the min idle watching the desired RPM, actual RPM, and IAC step counts. With TPI dry flow the IAC counts aren't all the important but I'd aim for 20-40 counts at idle, also get your TPS voltage below 0.65v.
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This sounds good, and I have a scantool. So, my plan would be to:
- warm the car up
- shut the car down, then turn the key on to let the IAC extend
- pull the plug on the IAC, then start the car
- adjust the idle according to the scanner (using the setscrew on the TB?)
Hopefully this'll do it. I'm trying to cure a stalling/stumbling problem when the car is cold. It will start fine, then the idle will go south and stall. If I keep pedaling it to have it stay running, it will pop back through the intake sometimes. Once the temp has come up a bit, it's fine. Any other thoughts?