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Is the L98 wiring harness from an F-body the same as wiring harness from a Corvette?

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Old Oct 24, 2013 | 10:00 AM
  #1  
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Car: '91 Trans Am
Engine: 350 Blueprint Engines Cruiser
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Is the L98 wiring harness from an F-body the same as wiring harness from a Corvette?

Out of curiosity, are the wiring harnesses (with MAP sensor) for a 350 TPI from a 90-92 GTA/Z28/Iroc the same as the 90-91 Corvette?

I would imagine that they are since GM was all about recycling parts, but wanted to check since there is a ton of experience in this board.

My goal is to use an L98 from a Corvette and have it work in my (now TBI) '88 T/A. I'm trying to find the best way to go about it. Common sense paired with some research & searching assumes that I could do one of the following:

- Use L98 from Corvette along with Corvette wiring harness and Corvette ECU with VATS disabled.
- Use L98 from Corvette along with F-body wiring harness and F-body ECU with VATS disabled.

Are the TPI harnesses for the Corvette and F-body are the same?
Will they plug into the same C100?
Will an L98 from a Corvette run on an F-body PCM?

My apologies if this has been asked before, but I have searched a ton and haven't found a solid answer. If you know of a thread that can point me in the correct direction, please post it up.

Thanks!
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Old Oct 24, 2013 | 10:05 AM
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Re: Is the L98 wiring harness from an F-body the same as wiring harness from a Corvet

Not even close, your better off making the tbi harness work. the 88 is a one year only ecm same pinout as the 746. Make the changes bye repining and adding the injector pigtail and go with the 1227730 ecm.
https://www.thirdgen.org/forums/tpi/...d-density.html
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Old Oct 24, 2013 | 10:33 AM
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t/adreams's Avatar
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From: New Hampshire
Car: '91 Trans Am
Engine: 350 Blueprint Engines Cruiser
Transmission: TKX 5 speed
Axle/Gears: 3:42
Re: Is the L98 wiring harness from an F-body the same as wiring harness from a Corvet

Originally Posted by Tuned Performance
Not even close, your better off making the tbi harness work. the 88 is a one year only ecm same pinout as the 746. Make the changes bye repining and adding the injector pigtail and go with the 1227730 ecm.
https://www.thirdgen.org/forums/tpi/...d-density.html
That is simple enough!
But just so I'm 100%- the Corvette L98 will run on the 730 PCM without an issue? I mean, it should by all means, but just want to be sure.

Last edited by t/adreams; Oct 24, 2013 at 11:54 AM.
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Old Oct 24, 2013 | 10:50 AM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Is the L98 wiring harness from an F-body the same as wiring harness from a Corvet

86-89 vettes use tpi maf the 1227165 same ecm as the f-body, 90-91 they used speed density a under hood version of the 730 the 1227727
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