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swapping 96lt1 into 305tpi car harness question

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Old Feb 12, 2004 | 01:52 PM
  #1  
Thirim's Avatar
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From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
swapping 96lt1 into 305tpi car harness question

I have a 96LT1 engine, and a 89gta 305tpi..
I have been told to get either a 94 or 95 computer, as these are obd1 and 96 is obd2, ie more money to program.. I would like to get 94 gear because i can get a hypertech for cheap..

Will I run into any problems with connectors or sensors if I use a 94 harness with the 94 computer with a 96lt1? Or should I just get a 96 harness?

Thanks.
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Old Feb 12, 2004 | 07:54 PM
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Don't get hypertech, those are pretty much worthless.
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Old Feb 13, 2004 | 11:54 AM
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From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Re: swapping 96lt1 into 305tpi car harness question

Originally posted by Thirim
I have a 96LT1 engine, and a 89gta 305tpi..
I have been told to get either a 94 or 95 computer, as these are obd1 and 96 is obd2, ie more money to program.. I would like to get 94 gear because i can get a hypertech for cheap..

Will I run into any problems with connectors or sensors if I use a 94 harness with the 94 computer with a 96lt1? Or should I just get a 96 harness?

Thanks.
You will be able to use your 96 harness, theres a slight difference, but the obdII to obdI conversion isnt that uncommon, do a search on www.camaroz28.com and you should be able to find it
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Old Feb 13, 2004 | 02:25 PM
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Yea, actually, I think all it involves in the conversion is removing the rear 02 sensors and removing a wire from the ecm. I read it before but don't remember the specifics.
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Old Feb 13, 2004 | 04:46 PM
  #5  
Thirim's Avatar
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From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
i don't have a harness yet.. I was wondering if i should just get a 94 harness or get the 96 harness?
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Old Feb 15, 2004 | 08:18 PM
  #6  
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Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Originally posted by pasky
Yea, actually, I think all it involves in the conversion is removing the rear 02 sensors and removing a wire from the ecm. I read it before but don't remember the specifics.




The conversion involves knock sensor wiring as the 96-97 PCM I believe has two knock sensor inputs and the 94-95 PCM has one. The knock sensors are different PN's too.. That's all I can remember top-o-my head.
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Old Feb 15, 2004 | 08:20 PM
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Originally posted by Thirim
i don't have a harness yet.. I was wondering if i should just get a 94 harness or get the 96 harness?
shouldn't be terrible to make the 96 harness work w/ the 94-95 PCM so if it's a lot cheaper, use it. If they're similar $, get the 94.

g'luck w/ your swap.

-Matthew
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Old Feb 16, 2004 | 05:34 PM
  #8  
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From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
thanks.. I think I have this part figured out.. Now I'm shopping for the cheapest harness
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Old Feb 16, 2004 | 07:26 PM
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Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
I would never buy a Street & Performance or Painless harness.

The reduced quantity of higher amperage fuses is a bane to troubleshooting. There's a reason you have several fuses in an OEM injection system and cutting the # down to a few which are higher amperage is not helpful to the system in any way, shape, or form.

Last I checked, Howell harnesses were properly fused; the owner once worked for GM I believe. But they may have gone the cheapass route at some point recently.

If you are in doubt, get an OEM harness. That's the only way to fly to assure you're getting one that's "right."
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Old Feb 17, 2004 | 06:59 PM
  #10  
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From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
when i said cheapest harness.. by far it wasn't painless... I am shopping for a good used harness

btw.. anyone have one??
im in the wtd ads..



thanks.
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