Whats more important...correct idle airflow, or correct IAC counts?
#1
Whats more important...correct idle airflow, or correct IAC counts?
I adjusted my idle airflow vs. ECT to the correct airflow, and now my desired IAC counts are between 250-280 at all times. So which needs to be right? I seem to have given myself a slight case of the cruise control effect...not quite enough to keep me accelerating, just enough for it to take the car a little longer to slow down while in gear and decelerating without the brake. What gives?
#2
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I've been playing with Idle Airflow a bit more too, and noticed the same thing. The higher the idle airflow value, the more IAC's.
How high do you have your values?
How high do you have your values?
#3
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I have a theory that once you open your throttle for a cam or whatever and increase the idle airflow to match, the pcm doesn't account for that when calculating what iac position it needs for a certain amount of flow. That could cause a cruise control effect because the iac would be opening too much to get the airflow needed under the throttle cracker tables. It would also throw off your desired iac counts i would think.
#4
Originally Posted by P Mack
I have a theory that once you open your throttle for a cam or whatever and increase the idle airflow to match, the pcm doesn't account for that when calculating what iac position it needs for a certain amount of flow. That could cause a cruise control effect because the iac would be opening too much to get the airflow needed under the throttle cracker tables. It would also throw off your desired iac counts i would think.