Anyone running TPI
Burning Brakes
Joined: Sep 2006
Posts: 1,071
Likes: 86
From: Rotonda FL
Unfortunately, if you have already installed your TPI and harness, the waterproof ECM has a different pin/plug arrangement from the non-waterproof. The two harnesses/ECM's are not compatible. I got my harness from Street & Performance, built specifically for the waterproof ECM.
Last edited by Rotonda; Nov 6, 2014 at 10:09 AM. Reason: addition
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Water resist or not, I like my electronics cool and dry, do the pass side storage bin, I have a map pocket in my '72, so fabbed a couple brackets and hooked 1227730 up behind the map pocket, plenty of room.....
Thread Starter
Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
You guys are great! I learned more in a handful of post, than I did in a year and a half of reading manuals and staring at the problem. I have been in the battery compartment hundreds of times, I never notice the space under the compartment door frame toward the drivers seat. Now I need to find the parts to build a five foot extension for the ECM wiring.
Thanks
Zorro
Thanks
Zorro
Pro
Joined: Oct 2008
Posts: 708
Likes: 28
I see 2 options for it. 1) buy a length of whatever color wire or 2) go over to Pick N Pull on Old 99 and grab the ECM harness for some mid 90s GM vehicle and use those wires to extend the harness. I'll look for a car that has the ECM under the rear seat or at least under the dash. You won't get much wiring from a car with it mounted under the hood. Any Thirdgen F-body would make a good candidate, too.
The GM harness would allow you to extend it using the correct wiring colors.
Either way I would solder and shrink wrap to do the actual extension.
The GM harness would allow you to extend it using the correct wiring colors.
Either way I would solder and shrink wrap to do the actual extension.
Thread Starter
Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
Amorget, The thirdgen F-body is a good idea. With the plugs on one end all I would need to find are female plugs for the other end and it would be plug and play. I might be able to get them from an old ECM. I defiantly want to keep the color coding on the wires correct. A long time ago I bought a 70 Z28, it was a rare car, clean and ran great. The one problem it had was at some point it had a wiring fire under the dash. The owner had replaced the dash and all the wiring (every bit of it) with orange wire. Being young and dumb I thought no big deal. It was a nightmare!
Zorro
Zorro
Last edited by Zorro O; Nov 6, 2014 at 03:47 PM.
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Pro
Joined: Oct 2008
Posts: 708
Likes: 28
Which ECM do you have? A 730 or a 165? They use different plugs and were available in different years.
Finding the female end isn't as easy as it sounds... I am not sure anybody makes them and the ECM end is soldered to the circuit board making it not very useful.
Finding the female end isn't as easy as it sounds... I am not sure anybody makes them and the ECM end is soldered to the circuit board making it not very useful.
Thread Starter
Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
Zorro
Pro
Joined: Oct 2008
Posts: 708
Likes: 28
It's pretty easy to tell which ECM you have without actually getting to the ECM. A 165 ECM will have a MAF where a 730 won't (it's a "speed density" ecm). If you don't have a MAF sensor somewhere in the intake tract then 99% sure you have a 730. If you have a MAP sensor, then basically 100% sure you have a 730.
To note, since you'll be doing this after the 1st of the year, PnP will probably have a 50% off sale around Thanksgiving, so that's a good time to pull the harness and save a few bucks.
To note, since you'll be doing this after the 1st of the year, PnP will probably have a 50% off sale around Thanksgiving, so that's a good time to pull the harness and save a few bucks.
Thread Starter
Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
It's pretty easy to tell which ECM you have without actually getting to the ECM. A 165 ECM will have a MAF where a 730 won't (it's a "speed density" ecm). If you don't have a MAF sensor somewhere in the intake tract then 99% sure you have a 730. If you have a MAP sensor, then basically 100% sure you have a 730.
To note, since you'll be doing this after the 1st of the year, PnP will probably have a 50% off sale around Thanksgiving, so that's a good time to pull the harness and save a few bucks.
To note, since you'll be doing this after the 1st of the year, PnP will probably have a 50% off sale around Thanksgiving, so that's a good time to pull the harness and save a few bucks.
Zorro
Pro
Joined: Oct 2008
Posts: 708
Likes: 28
http://www.picknpull.com/
However, www.row52.com is the best place to check their inventory. For a 730 ECM it will only be 90-92 F-bodies, however the V6 version will work. The J-bodies used the same ECM, so you could pull the harness from one of them. I am not 100% sure what year J-Bodies used the 730, but it's probably in the same range as the F-bodies. The harness length won't be that much different I don't think.
However, www.row52.com is the best place to check their inventory. For a 730 ECM it will only be 90-92 F-bodies, however the V6 version will work. The J-bodies used the same ECM, so you could pull the harness from one of them. I am not 100% sure what year J-Bodies used the 730, but it's probably in the same range as the F-bodies. The harness length won't be that much different I don't think.
Thread Starter
Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
Zorro