Iac position?
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Launching!
Joined: Feb 2010
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Iac position? I recently installed a cc503 cam and got a mail order tune for it. Using eehack I saw that at warm idle my iac position is at around 60. Is that acceptable? I'm having issues with it shutting off when putting it in reverse or drive so I'm wondering if this could be the cause?
TECH Veteran
Joined: Apr 2008
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IAC wants to be 30-35 (32) at idle. maybe yours are pegging at 160 when you add load to engine (putting it in gear, turning the wheel, etc)
what are they when you put it in gear and it stalls?
if 60 that should not be a issue.
do you have a tune for the new cam?
what are they when you put it in gear and it stalls?
if 60 that should not be a issue.
do you have a tune for the new cam?
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I recently installed a cc503 cam and got a mail order tune for it. Using eehack I saw that at warm idle my iac position is at around 60. Is that acceptable? I'm having issues with it shutting off when putting it in reverse or drive so I'm wondering if this could be the cause?
Something is happening where you either aren't getting enough fuel or air when the additional load of being in gear is applied. IIRC there is a table in the PCM that specifically applies to the A4 guys where additional idle air or fuel is added when placed into gear.
Yes. In datalogging and you can graph it too.
TECH Veteran
Joined: Apr 2008
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???, higher than normal IAC counts (60) are common with aftermarket TB and cams, not so much with stock TB as they have the center idle air hole in them
Still IAC at 60 with engine at operating temp and no AC on is high. Should be 30-35. If you could read IAC counts when you put it in gear to see if they peg at 160. Then the car would stall
Who did the mail order tune?
Have you discussed your issue with them?
Still IAC at 60 with engine at operating temp and no AC on is high. Should be 30-35. If you could read IAC counts when you put it in gear to see if they peg at 160. Then the car would stall
Who did the mail order tune?
Have you discussed your issue with them?
12 Second Club
Joined: Dec 2015
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My car is exactly the same way since my CC503 install. My IAC has been at 32-34 at idle when I was stock. I have the stock throttle body on mine as well. My PCM was tuned by Solomon and now stays up around 100-120 at idle in park/neutral and around 130 in gear... Is there a way to fix this or is it just in the tune?
12 Second Club
Joined: Dec 2015
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