Carb Swap Need Help ASAP
05-31-2008, 12:07 PM
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Car: 1987 Pontiac GTA Trans Am
Engine: Basic Stroked SBC..383
Transmission: PerformaBuilt 700R4 3000 Stall
Axle/Gears: Moser 9in. 3:70s
Carb Swap Need Help ASAP
Im changing my 87 GTA TPI over to carb. Im selling parts and my factory motor and I have a guy that wants it. He wants the wireing harness and ECM too. My questions..What all do I need from the harness/ECM to make my factory gauges work. Is there anything controlled from this other than the gauges I need to know about. Is there anything I need off of it? Should I just let him have it all or what. Thanks for the help
05-31-2008, 03:04 PM
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Car: '81 Z-28
Engine: Soon to be a 383
Transmission: Muncie
Axle/Gears: 3.42
Re: Carb Swap Need Help ASAP
Gauges, starter, and dizzy. You will also need to re-wire the fan.
05-31-2008, 03:08 PM
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Car: 1987 Pontiac GTA Trans Am
Engine: Basic Stroked SBC..383
Transmission: PerformaBuilt 700R4 3000 Stall
Axle/Gears: Moser 9in. 3:70s
Re: Carb Swap Need Help ASAP
So I he can take the TPI harness and ECM Right?
06-02-2008, 08:04 AM
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Car: 1987 Pontiac GTA Trans Am
Engine: Basic Stroked SBC..383
Transmission: PerformaBuilt 700R4 3000 Stall
Axle/Gears: Moser 9in. 3:70s
Re: Carb Swap Need Help ASAP
What about my oil pressure and temp? I know they are in the in TPI side of the harness.
06-02-2008, 10:53 AM
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Car: 1966 El Camino Custom
Engine: 350
Transmission: 200R4
Axle/Gears: 3:73 12 bolt with Brute Strength
Re: Carb Swap Need Help ASAP
On my '85, they were not part of the TPI harness.
Check out a Summit or Jegs catalog. Choose a fan controller that works off a water temperature sensor. I used a Painless wiring unit that was easy to install. It had a screw in sensor that mounted right on the intake manifold coolant supply. It was very reliable.
Check out a Summit or Jegs catalog. Choose a fan controller that works off a water temperature sensor. I used a Painless wiring unit that was easy to install. It had a screw in sensor that mounted right on the intake manifold coolant supply. It was very reliable.
Last edited by wesilva; 06-02-2008 at 10:58 AM. Reason: Additional information
06-02-2008, 02:43 PM
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Car: 1987 Pontiac GTA Trans Am
Engine: Basic Stroked SBC..383
Transmission: PerformaBuilt 700R4 3000 Stall
Axle/Gears: Moser 9in. 3:70s
Re: Carb Swap Need Help ASAP
Im not worried about making the fans work, but my factory gauges and what wires run into the pass. fender to power the gauges. Iv found a site to make the speedo work with a Th400.
06-02-2008, 04:39 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
There are sensor wires that run to the passenger side harness, but not gage wires.
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06-02-2008, 10:10 PM
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Car: 1987 Pontiac GTA Trans Am
Engine: Basic Stroked SBC..383
Transmission: PerformaBuilt 700R4 3000 Stall
Axle/Gears: Moser 9in. 3:70s
Re: Carb Swap Need Help ASAP
Im just so lost on this swap and how Im going to get the gauges to work. But I can sell him the whole harness and ECM?
06-02-2008, 10:15 PM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: Carb Swap Need Help ASAP
for him to make the engine work correctly, he'll need the entire TPI harness and ECM which includes the gauge wiring that's built into the TPI harness. All of the gauges can be tapped into on the side of the bulkhead connector that the TPI harness plugs into. Now if you're going to continue running the in tank fuel pump, that wiring does go through the passenger side wiring connector, plugs into the connector under the dash and then runs all the way over to the driver side plug that goes to the back with the taillights and such. You will also need to give him the relays that are bolted above the brake booster in the setup.
06-02-2008, 10:15 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You can sell him the ECM, the harness that goes from it to the engine compartment, and everything on the other end of the harness.
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