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Old 05-14-2009, 09:15 AM   #1
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Join Date: May 2004
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ecm iac pin #
anyone know what color and pin # the wires are at the ecm for the iac on an 87 tpi motor.I have the 165 ecm but im haveing a high idel problem and im going to check to see if i have a broken wire from the plug to ecm because everything else is good its either wire short or bad ecm unless theres something i dont know to test for.Im not showing any codes.I need a good scan tool that tells me what the ecm is seeing.While on that topic anyone know what kind i need to tell me this.Im looking at the ones at advance and walmart the walmart is $100 and the advance one is $250 or $300 something like that but id like to know if its what i need for my 87 plus id like to know if it will work on all obd2 cars as well.Thanks experts!!!!!!!ohh yea i need thoes pin # and/or wire colors mostly lol.....
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Old 05-14-2009, 10:01 AM   #2
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Re: ecm iac pin #


IAC "B" low C3 Lt. Grn/Blk
IAC "B" high C4 Lt. Grn/Wht
IAC "A" high C5 Lt. Blu/Wht
IAC "A" low C6 Lt. Blu/Blk

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Old 05-14-2009, 07:14 PM   #3
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Re: ecm iac pin #
cant get any better than that thanks alot man
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Old 06-09-2009, 03:33 PM   #4
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Re: ecm iac pin #
this is good info do you know if its the same for an 89 iroc 5.7 I need to check some connections
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Old 06-12-2009, 10:12 AM   #5
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Re: ecm iac pin #
I would say.It should be the same if you have the 165 ecm like mine
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