TPI WIRING HARNESS
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Joined: Aug 2021
Posts: 1
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From: milaca, mn
Car: 89 Iroc z
Engine: 5.7
Transmission: 700r4
TPI WIRING HARNESS
Hello, i have a 1989 Iroc-z with the 5.7L. I purchased this as a project. the previous owner removed the TPI set up. And completely butchered the wiring harness. i have a harness from a 90 TPI set up but i’m not sure if this will work. any info on this would be greatly appreciated
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Joined: Feb 2005
Posts: 2,508
Likes: 201
From: Hawaii
Car: 89' Firebird / 87' Formula
Engine: 3.4 / 5.0
Transmission: 700-R4
Axle/Gears: 3.42 / 3.42
Re: TPI WIRING HARNESS
You'd need the ECM as well since they use diffrent setups.... that ans a MAP sensor and I think a few other sensors as well...I THIN kthe plenum might also be different.
Joined: Nov 2008
Posts: 2,093
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: TPI WIRING HARNESS
http://www.austinthirdgen.org/index.php?pid=19
you will need a 90-92 ecm, whatever sensors you maybe missing for a speed density(I don't know what you got for a setup) and possibly some repinning of the c207 and c100 connectors. Check that link to see harness diagrams for the 2 applications.
if you're using the cars original plenum then you'll need to add one vacuum port, and there's no mounting boss for the map sensor.
you will need a 90-92 ecm, whatever sensors you maybe missing for a speed density(I don't know what you got for a setup) and possibly some repinning of the c207 and c100 connectors. Check that link to see harness diagrams for the 2 applications.
if you're using the cars original plenum then you'll need to add one vacuum port, and there's no mounting boss for the map sensor.
Last edited by aliceempire; Sep 7, 2021 at 06:21 PM.
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