iac counts high at cold idle
#1
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iac counts high at cold idle
when my car first starts my iac counts are in te 170's as it heats up they drop to zero.. how do i fix this
as of not my set screw is removed but i have a 9\16 hole in my tb blade
also i notice my stit starts out low (-.2 lb\min) and it slowly works its way up to (-.91 lb\min) as the car warms up
if anyone is intrested i have this all loged in a 8 min warmup hpt log it shows all the idle pids so hopefully if someone views it they should really have a good idea whats going on...
thanks!
-john
as of not my set screw is removed but i have a 9\16 hole in my tb blade
also i notice my stit starts out low (-.2 lb\min) and it slowly works its way up to (-.91 lb\min) as the car warms up
if anyone is intrested i have this all loged in a 8 min warmup hpt log it shows all the idle pids so hopefully if someone views it they should really have a good idea whats going on...
thanks!
-john
#2
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Have a large cube motor, heads/cam or aftermarket throttle body? One or all of those combinations can change the effectiveness of the IAC.
I've seen some large cube motors commanding 310 steps if started cold with the a/c on and steadily drop to 0 as it warms up. Normally this is caused by the motors demand for air outgrowing the iac's effectiveness.
I've seen some large cube motors commanding 310 steps if started cold with the a/c on and steadily drop to 0 as it warms up. Normally this is caused by the motors demand for air outgrowing the iac's effectiveness.
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any other table affect desired air flow i tried using redhard supers's spreedsheet but it kept on telling me to lower my raf values ???
also how do i know how much to pull\add to desired airflow?
also how do i know how much to pull\add to desired airflow?
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#8
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Originally Posted by Jpr5690
Once Counts Are At Zero Idle Is Fine But When The Car Is Cold The Iac Couns Are High And The Idle Hunts
I think this could be my idle problem as well. My RAF is in-line, and my startup A/F is where is needs to be, but my startup idle hunts until the IAC values drop down. I too see IAC position below 10 when its warmed up and it idle nicely.