Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Nightmare under the hood

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Old 03-02-2010, 03:09 PM
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Car: 1986 Z28
Engine: 305
Transmission: T5
Axle/Gears: 4.11
Nightmare under the hood

As you can see it's a nightmare under here, wires every where. I have no clue what almost any of them are, I think AC wires. How do I know what ones I can cut out, cause the AC doesn't work and I wish it actaully looked nice under here. Is there any site or page that points to what each wire does? Thanks.
Attached Thumbnails Nightmare under the hood-100_0771.jpg   Nightmare under the hood-100_0772.jpg  
Old 03-04-2010, 01:28 AM
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Car: 85 Z28 T-Top 36mm sway & wonderbar
Engine: TPI L98 350 W/85 Vette Stage II ECM
Transmission: W/C T-5, alum drive shaft
Axle/Gears: 9 bolt posi, 3:27, PBR's, BB LS1's
Re: Nightmare under the hood

Was this car originally a Tune Port Injection motor or a Throttle Body Injection motor? Someone changed it to a carb and left a lot of the original wires hanging. You need to remove the lower kick panel on the passenger side and see if the ECM computer box is still there. if it is, unplug it and see if the car will start up. it may be by-passed. there should be a bar code tag with numbers on it, you can reference it on the INTERNET. You can check your VIN# to see what this car originally had. I do not recommend cutting any of these wires as they can be carefully removed and sold to someone who needs them. Wiring harnesses and ECM's for these cars are getting very hard to find.

Last edited by 85 ZXX; 03-04-2010 at 04:04 AM.
Old 03-04-2010, 06:45 AM
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Car: 1986 Z28
Engine: 305
Transmission: T5
Axle/Gears: 4.11
Re: Nightmare under the hood

It was orginally a 1986 V6, probably carburated. Whoever had it before dropped a 305 carb in it, don't think there's any computer chips anywhere.
Old 03-04-2010, 08:18 PM
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Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: T56
Axle/Gears: 8.8 3.73
Re: Nightmare under the hood

The harness is obviously modified and no use to someone else, short of a engine swapper

Read this thread and see what you think
https://www.thirdgen.org/forums/ltx-...p-3rd-gen.html
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