LS1 ECU and harness upgrade?
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Joined: Oct 2004
Posts: 379
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
LS1 ECU and harness upgrade?
If I was to purchase a 98 LS1 with no ecu or harness can i get a 99 or new ecu and harness and just plug and play? or is their a lot of sensors that will need changed. I've been serching for hour and got nothing.
Supreme Member
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LS1 ECU and harness upgrade?
You can use a 99+ PCM and harness with no problems at all. I want to say that the coil packs are different.....but I haven't compared my 98 coil packs to a 99+
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Joined: Aug 2005
Posts: 118
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From: Florida
Car: '83 Camaro
Engine: LS1
Transmission: T56
Axle/Gears: 3.23
Re: LS1 ECU and harness upgrade?
edit: Oh yea, I used a 99+ harness and PCM on my 98 motor with no problems.
Thread Starter
Member
Joined: Oct 2004
Posts: 379
Likes: 0
From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Re: LS1 ECU and harness upgrade?
Coils for the 98 are all seperate whereas the 99+ are mounted together iirc. I had no clearance issues with my 98 coils since the mounting brackets are small. Others have used 6.0 truck coils to help with clearance.
edit: Oh yea, I used a 99+ harness and PCM on my 98 motor with no problems.
edit: Oh yea, I used a 99+ harness and PCM on my 98 motor with no problems.
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