IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Tim Hensley on November 12 2019, 01:26:44 AM
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IAC has always been 20-23. Tonight when I took it for a drive it started slow (more cranking than normal) no big deal. Ran good returned, home it sat for 30 minutes sweep the garage fired it up and it was idled around 1500 for 10 seconds. Water temp was 160 flipped it to IAD as the idle came down to its 700 and IAC was 4 slowly came to 9.
All vacuum lines look good and no one appearing to leak. Got the line into the climate control to check tomorrow (I was getting more hungry than desperate to get to the bottom of my problem)
Should I pickup starting fluid or carb cleaner tomorrow? You know to spray around the intake.
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If your 02's look okay, I would not suspect a vacuum leak as a cause of low iac numbers. Do the counts come up into the usual 50's range or whatever your car shows when driving? Is the idle speed correct?
IAC's don't matter other than at idle. All it does is try to keep a constant idle speed as engine load varies at idle. It may simply mean that your iac is on the fritz. I guess you could spray around it to see if the case is cracked on the solenoid or not.