TunerPro User Forum

Thanks for the suggestion. I've done that, set IAC start to 50. Have my desired idle down to 550 just so I actually get 750 out of it. Still starts out high when cold. If anyone is interested in reviewing my log file, i could send it along with the bin. That might help you see how it's running and w...

1988 Chevy R20 with (1991) 7.4L (454) It idles too high Vacuum leaks ruled out. I have datalogged a cold start, to full temp then short drive. IAC counts around 50ish at idle and up to 110 at 55mph. Interestingly, spark advance stays at 0.00 the whole time (I verified that the electronic spark timin...