upgrading ECM need help..

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Jul 26, 2005 | 05:52 PM

m300slr

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iTrader: (4)

Joined: Mar 2002

Posts: 241

Likes: 5

From: Cincinnati, OH

Car: 1985 Z28

Engine: 350 TPI

Transmission: T56

Axle/Gears: 3.90 10 bolt eaton posi

upgrading ECM need help..

I would like to upgrade to a 165 ecm from the old 85 year ECM. My question is, I read the tech artical about swaping ecm's, but cant I just buy a painless wiring kit and rewire the engine with the 86-88 harness. Instead of splicing, cutting, adding, subtracting and doing all kinds of things to my existing harness. I mean the 85 and 86 are the same emgines with only a few changes like relays. I just think it would be overall esier and better to just get the new harness to fit the new ECM.
Thanks for helping.

Jul 31, 2005 | 01:15 PM

Ollie8974

Junior Member

Joined: Jul 2005

Posts: 49

Likes: 1

From: Lynnwood Wa.

Car: 1979 Zcode TA

Engine: 220hp 400ci Building a EFI 455

Transmission: 4 speed

Painless Harness

Yes that is what I am doing Check out
www.Summitracing.com

part number PRF 60103 or PRF 60203. or do a search key word Painless.
$315.00 or so well spent