wheres the purple wire, is in the same place as the tan one should be, heres a simple test, start the car and listen to the way it runs, turn it off and then unplug that wire by the heaterbox, start the car back up and if its running diff and the RPMS are lower also that means you got it, and a camaro/firebird tbi is the same as the truck tpi and the harness i worked on both of best worlds.
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87 Trans Am 5.7, Auto, posi disc rear, flowmaster muffler, all org car.
88 Iroc-Z TPI, Cammed 350, Vortex Heads, Magnaflow, T5, 4 Wheel Disc, 3.27 9 Bolt PBR.
91 Trans Am VertTPI 350. 700r4, K&N Air Cone, Ryven Muffler.
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