IAC Sticking?
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IAC Sticking?
Well just out of curiousity (and a really bad low idle problem), I unscrewed the IAC today. I took it out and pushed on the end. The end with the spring attached won't budge. The dude at autozone told me it's supposed to go up when you push. . Is this normal? Thanks!
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Car: RS
Engine: 305
Transmission: 4L60
Axle/Gears: 3.42
on a tbi its the "thing that is connected to the bottom of the air cleaner, I zip tied mine to the firewall when I put an open element on, I'm pretty sure you can clean them
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Yes, The IAC can be cleaned. Although i beleive your reffering to the IAT, or intake air temp sensor. I took the pintle out to clean & lube my old one to try to revive it. If you want you can jsut short pins A & B on the ALDL and the computer will eject the pintle for you.
To the origional poster:
As for the low idle, how low does it idle? The stock tbi's are set to have a target idle speed around 550 rpms or so. One sure way to tell that the IAC is bad is a lack of a high cold start idle and off idle bog when you go to accelerate.
To the origional poster:
As for the low idle, how low does it idle? The stock tbi's are set to have a target idle speed around 550 rpms or so. One sure way to tell that the IAC is bad is a lack of a high cold start idle and off idle bog when you go to accelerate.
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My Idle is high when I start it up cold....seems normal. Idle's 650-700 in drive and 1000 in park...then after the engine heats up a little, it goes down to 500 in drive and about 600 in park (with jumping rpm's)......and yeah it does bog pretty bad when I accelerate when it's cold. Thanks a lot.
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Car: 86-FireBird
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Transmission: T5
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If you do clean the ICA be careful. Only clean the tip and never spray the whoel sucker down with anything like carb cleaner. You can ruin it. Mosttime the tips and where it seats just gets gummy.
Matt
Matt
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Originally posted by CamaroRS91x
My Idle is high when I start it up cold....seems normal. Idle's 650-700 in drive and 1000 in park...then after the engine heats up a little, it goes down to 500 in drive and about 600 in park (with jumping rpm's)......and yeah it does bog pretty bad when I accelerate when it's cold. Thanks a lot.
My Idle is high when I start it up cold....seems normal. Idle's 650-700 in drive and 1000 in park...then after the engine heats up a little, it goes down to 500 in drive and about 600 in park (with jumping rpm's)......and yeah it does bog pretty bad when I accelerate when it's cold. Thanks a lot.
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Could be egr. A valve thats stuck can cause idle problems. What kind of vacuum does it pull at ilde when warm?
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Car: 1989 IROC-Z
Engine: 350 TPI
Transmission: 700R-4
Don't mean to jack anyone's thread but I got a quick question: On the procedure for adjusting the IAC, where in the procedure do you REMOVE the paper clip from the ALDL port? I just don't want to screw up the ECM in any way. Thanks.
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Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Originally posted by Irocster
Don't mean to jack anyone's thread but I got a quick question: On the procedure for adjusting the IAC, where in the procedure do you REMOVE the paper clip from the ALDL port? I just don't want to screw up the ECM in any way. Thanks.
Don't mean to jack anyone's thread but I got a quick question: On the procedure for adjusting the IAC, where in the procedure do you REMOVE the paper clip from the ALDL port? I just don't want to screw up the ECM in any way. Thanks.
Turn key On
Wait 30 secs
Unplug IAC
Key off
Unshort A to B
Start engine and set min idle, TPS what ever.
Take car for test drive and exceed 35 MPH a few times, this forces an IAC reset, in the ecm code wise.
Stop and Recheck idle.
Things should be OK.
If the adjustment was fubar'd or there is some loose gunk it might take a redo.
Found this on another thread from GRUMPY. Vader also has the details but this is it.
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