Quote:
Originally Posted by Rob Petrie E395
Are you saying eliminate the IAC all together. And adjust the idle with the min idle set screw for the throttle blades? Or eliminate that as a possibility. I swapped the IAC valve for a known good one.
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I would just eliminate it. Click IAC type "none". Open the throttle setpoint a turn or two, redo a TPS auto reset, fire it and fiddle with the area around your idle area in the map.After you get it idling well you can turn your idle back down to your liking (in gear) and do a 2nd TPS auto reset. Also, depending on how much of the load the IAC was carrying you might develop a slight stumble in the off idle areas as you jab it. A little extra fuel in the acceleration map will cure that, but cross that bridge when you get to it. Make sure to rename it and save "as is". You can always put your old tune back in if you like the use of a IAC better. But I have seen stepper motors act like yours. It's probably one little area in your map where the modifiers and IAC blend together that causing you fits. Try this as its a pretty easy test..