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TPI Engine Harness Help

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Old Sep 19, 2015 | 03:23 PM
  #1  
Camaroguy2's Avatar
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From: New Windsor, NY
Car: 1991 Camaro RS
Engine: TBI 305 soon to be a TPI 350
Transmission: 700r4
Axle/Gears: 3.23 Gears
TPI Engine Harness Help

Okay so im swapping my 305 TBI for a 350 TPI. I bought the complete engine from a guy in jersey, it came with the whole accessory drive, engine harness, computer and even the the fuel pump. What i need to know is if the engine harness I have for the TPI is going to hook up to the TBI car with no problems.
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Old Sep 19, 2015 | 07:24 PM
  #2  
Dyno Don's Avatar
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: TPI Engine Harness Help

As long as it is a '90-'92 harness it is plug and play.
There will be a few changes under the dash tho.
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Old Sep 21, 2015 | 06:10 AM
  #3  
Camaroguy2's Avatar
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Joined: Mar 2014
Posts: 9
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From: New Windsor, NY
Car: 1991 Camaro RS
Engine: TBI 305 soon to be a TPI 350
Transmission: 700r4
Axle/Gears: 3.23 Gears
Re: TPI Engine Harness Help

what is going to change under the dash?
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Old Sep 21, 2015 | 10:42 AM
  #4  
Dyno Don's Avatar
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: TPI Engine Harness Help

Originally Posted by Camaroguy2
what is going to change under the dash?
The VSS feeds direct to the ECM (eliminate the buffer) the ECM feeds the speedo.
You have to move the "E" wire to the "M" on the ALDL plug (orange wire)
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Old Sep 22, 2015 | 08:22 AM
  #5  
Camaroguy2's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2014
Posts: 9
Likes: 0
From: New Windsor, NY
Car: 1991 Camaro RS
Engine: TBI 305 soon to be a TPI 350
Transmission: 700r4
Axle/Gears: 3.23 Gears
Re: TPI Engine Harness Help

Originally Posted by Dyno Don
The VSS feeds direct to the ECM (eliminate the buffer) the ECM feeds the speedo.
You have to move the "E" wire to the "M" on the ALDL plug (orange wire)
do you have any pictures of which wires need to be changed?
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