LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

IAC wiring

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Old Dec 31, 2019 | 07:04 PM
  #1  
94Z28LS1toLT1's Avatar
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From: las vegas
IAC wiring

Hey guys I've been going thru stress and hell trying to pin why my camaro is starting then stalls. I've done all the fuel things. Pump,filter,regulator,checked injectors no leaks. I'm in the process of changing my dizzy I'm done with that now,just gotta put the water pump and all else back on.

Before I decide to put everything back on i decided to check the iac valve wires I noticed two are broken off out of the 4 that I see on the connector. I found the other two wires,would the two wires broken off be the issue to my start up and stalling the whole time.


This is what i found

now I can't tell which wires go where because they both look the same color green with a white stripe in the middle,any help is really appreciated. I looked at the ABCD on the wiring and the B and D are the ones that are not connected.


Last edited by 94Z28LS1toLT1; Dec 31, 2019 at 07:34 PM.
Old Dec 31, 2019 | 08:24 PM
  #2  
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Re: IAC wiring

Nevermind my wife helped me connect the wires and she found the right colors,and I connected them. The camaro is staying on and not stalling no more. After this whole time 😒😒😐🤐
Old Dec 31, 2019 | 10:06 PM
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Re: IAC wiring

When you cold start the car, the PCM uses the IAC to elevate the idle, depending on the coolant temperature. The M6 program can raise the idle as high as 1,200 RPM at very low temperatures. If it can’t raise the RPM, it might stall. Unfortunately, there is no feedback to the PCM to tell it if the IAC is working or not, so no DTC code.
Old Jan 1, 2020 | 07:31 AM
  #4  
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Re: IAC wiring

Originally Posted by Injuneer
When you cold start the car, the PCM uses the IAC to elevate the idle, depending on the coolant temperature. The M6 program can raise the idle as high as 1,200 RPM at very low temperatures. If it can’t raise the RPM, it might stall. Unfortunately, there is no feedback to the PCM to tell it if the IAC is working or not, so no DTC code.
cool thank you Fred I just can't believe the whole time because of two wires off the iac it caused this whole dilema. It's ok I'm happy as heck man that the camaro is not stalling anymore n stays running. 👍👌

Last edited by 94Z28LS1toLT1; Jan 2, 2020 at 08:03 PM.
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