87. Nutter question. Purple wire from ECM not previously connected - JeepForum.com
 
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post #1 of 5 Old 01-16-2016, 11:27 AM Thread Starter
Imposter71
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1987 YJ Wrangler 
 
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87. Nutter question. Purple wire from ECM not previously connected

Need some guidance please. Trying to nutter my 87 with weber carb. Traced purple and orange from dist to firewall no problem. Expected color change from Ign module side so removed washer and coolant resevoirs. Pulled Ign module up to work on it. Orange wire goes into a plug and changes to green w/blk stripe. I can follow that to firewall. What is confusing me is that the purple goes into the plug and then appears to be terminated there and not continue. Is that correct? Do I splice to it anyway and then run my new wire to purple from distributer?

The jeep runs as is, just not well. ( hard start and weak) From what I read here, especially since the PO had put a weber on, sounded like nutter would help.

Thoughts/ suggestions? Any help is appreciated.

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Last edited by Imposter71; 01-16-2016 at 11:36 AM. Reason: Correction. Meant ign mod not ECM
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post #2 of 5 Old 01-16-2016, 11:37 AM Thread Starter
Imposter71
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Correction

Sorry. I meant ignition module not ecm. The ecm is what i am bypassing. Right?
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post #3 of 5 Old 01-16-2016, 01:22 PM
Mike Romain
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Best to use two new wires twisted together for RF protection and hook the orange and purple wires direct. The ECU controls the spark and the signal the purple wire would have used. It also has a clamp on the orange wire.
One the module is wired directly, you will need to reset your timing at idle with the the vacuum line off and plugged.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #4 of 5 Old 01-17-2016, 03:33 PM Thread Starter
Imposter71
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Ok,thanks. That makes sense. For some reason I was under the impression that the purple went all the way up to the firewall as well. I went back and reread the bypass instructions. I may mess with it in the next couple weeks whenI am off work. I am trying to get this thing ready to sell. Was going to be a father/son project with my 16 yr old but we had a change of plans because we lucked into a CJ8. Can only afford 1 project jeep so unfortunately for now the YJ has to go. I was trying to do a few simple things to get it running as well as I could without putting any more money into it.....
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post #5 of 5 Old 01-18-2016, 04:45 AM
Mike Romain
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Wiring it direct is well worth the effort. Doesn't take long.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos:
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