IAC Valve
11-01-2008, 05:40 AM
#1
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Car: 1987 Black IROC-Z (SOLD)
IAC Valve
I just cleaned my IAC valve and could not remember ever replacing it, so it may be the original. Do these thing wear out or go bad???
11-01-2008, 04:30 PM
#2
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Re: IAC Valve
Sure they go bad...but ususally thy die and don't move in/out. Can m\be monitored easily enough with a scan tool by watching the IAC counts.
PS...if it's still out, do not appply voltage to it, unless you're in a really confined area and you can locate the pintle
Also, clean the passage ways and seat in the TB as well.
PS...if it's still out, do not appply voltage to it, unless you're in a really confined area and you can locate the pintle
Also, clean the passage ways and seat in the TB as well.
11-01-2008, 05:44 PM
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Re: IAC Valve
Sure they go bad...but ususally thy die and don't move in/out. Can m\be monitored easily enough with a scan tool by watching the IAC counts.
PS...if it's still out, do not appply voltage to it, unless you're in a really confined area and you can locate the pintle
Also, clean the passage ways and seat in the TB as well.
PS...if it's still out, do not appply voltage to it, unless you're in a really confined area and you can locate the pintle
Also, clean the passage ways and seat in the TB as well.
11-01-2008, 05:48 PM
#4
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Re: IAC Valve
No, the IAC motor is a phase motor, I/e "stepper count" and what you read from a scanner is the counts off the motor, and it's current location/postion (as it tells the ECM where it is at)
11-07-2008, 01:39 PM
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Car: 1992 Z28
Engine: 350 TPI
Transmission: World Class T-5 5speed manual Trans
Axle/Gears: STOCK G92 performance 3.42
Re: IAC Valve
if you take it out and there is "slop" or play in it when you try to move it, get a new one. And you'll notice smoother idle and shifts on a stick car.
11-07-2008, 07:55 PM
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Car: 91 TA
Engine: 355 FR Stealth Ram
Transmission: T56
Axle/Gears: BW 9 BOLT 3.27
Re: IAC Valve
My TA started normally. but after it warmed up it would idle high. So I checked the IAC and it was broken. So I replace it and set it and now it won't start and stay running without giving it a little gas for a few minutes. After it is warm it seems to idle pretty smooth.
Does anyone know if the ECM is different for a stick car? Even in neutral the idle still doesn't want to come down til a complete stop. I'm a t-56 conversion on an original T-5 but I pulled the ECM the other day and it was a reman from 1995 with a jet chip from 1991. Anyone in J-ville FL have all this tuning equipment they would like to rent? Anyone want to get together and help each other rebuild a couple T-56's?
Does anyone know if the ECM is different for a stick car? Even in neutral the idle still doesn't want to come down til a complete stop. I'm a t-56 conversion on an original T-5 but I pulled the ECM the other day and it was a reman from 1995 with a jet chip from 1991. Anyone in J-ville FL have all this tuning equipment they would like to rent? Anyone want to get together and help each other rebuild a couple T-56's?
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