IAC & TPS Questions
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Joined: Sep 2008
Posts: 178
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From: Atlanta
Car: 1992 Z28
Engine: 305
Transmission: 5 speed
Axle/Gears: 3.42
IAC & TPS Questions
I read the procedure to adjust the IAC and the TPS but if I buy news ones do they need to be adjusted out of the box?
Joined: Aug 2011
Posts: 661
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From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: IAC & TPS Questions
When I replaced my TPS and IAC on my 91 Firebird the only thing I did was take it for a 20 minute drive around town between 35 and 45 MPH to have the ECM relearn the IAC settings. Been running great since.
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Joined: Jul 2009
Posts: 2,328
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From: Kitchener, ON
Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: IAC & TPS Questions
Yes, you still have to set both the minimum idle air RPM as well a the TPS voltage when you replace the TPS.
The IAC motor will "learn" A/C load and other conditions over time. It might take a while for the idle speed to be exactly correct under all conditions even after you do the adjustments.
The IAC motor will "learn" A/C load and other conditions over time. It might take a while for the idle speed to be exactly correct under all conditions even after you do the adjustments.
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mdtoren
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Aug 16, 2015 05:45 PM
