1982 cj5 ecm control module - JeepForum.com

 
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post #1 of 12 Old 02-26-2013, 10:57 AM Thread Starter
rtaff
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1982 cj5 ecm control module

Under the hood on driver side fender well there is a square box, I guess a control module. A lot of wires going to it, maybe 20. Sent box off to be rebuilt or replaced. They said box couldnt be rebuilt and they dont have any. Number on box is 3240802, was told numbers changed to EM 10898. Looked and called every where, cant find a replacement. Jeep is 6 cylinder, 4 speed. What would the best thing to do? Robert

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post #2 of 12 Old 02-26-2013, 11:25 AM
John Strenk
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Do you have emission testing?
If not, then I would remove it. Your engine should run with that disconnected.

If I recall properly, the ignition was not controlled by the fender mounted ECM. It just controlled the mixture. So "No Nutter Needed"

Look like this ? :
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post #3 of 12 Old 02-26-2013, 11:49 AM Thread Starter
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yes, that is it. I thought maybe the wire going to the carb. worked from this box. No emission testing.
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post #4 of 12 Old 02-26-2013, 11:53 AM
John Strenk
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post #5 of 12 Old 02-26-2013, 02:56 PM Thread Starter
rtaff
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John, tried to add pics. but it wouldnt let me. Back of carb. there are maybe 4 or 5 wires that go into a plastic connector. The connector then plugs into back of carb. It has a factory 2 bbl carb. on it. I dont know if these wires has any thing to do with the module or not. The module looks just like the one in the pic. you posted. Thanks for the help. Robert
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post #6 of 12 Old 02-27-2013, 03:06 AM
John Strenk
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Yes the wires go directly to this module, it finely tunes the fuel mixture.

Unless you live in a Emission state, you probably don't need it.
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post #7 of 12 Old 02-27-2013, 03:56 AM Thread Starter
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Thanks John
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post #8 of 12 Old 03-02-2013, 05:32 PM Thread Starter
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Jeep will run without this box but not good. Do I need to replace the carb. since it has this stepper motor on it. If I replaced the carb. would it do away with some of the vacum hoses? Every thing now is stock. 6cyl. 2bbl. carb. and stock distributor. Has any body else ever had this problem with this module that is mounted on driver side fender well? If you did, what did you do? The jeep is a 1982 cj 5. Thanks for the help
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post #9 of 12 Old 03-02-2013, 10:54 PM
Bigjonh
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I have a 82 cj7 with the same looking Module mounted on the fender. I'm not sure if it's working, but my jeep runs fine, and recently past the smog testing here in Calif. I tried to locate a new or used ECM when I was restoring my jeep because the ECM was missing the cover.
I couldn't locate either and then just fabricated my own cover and cleaned it up. I left mine on just so it could pass the visual part of the smog test.

I was just wondering how do you know it's not working.
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post #10 of 12 Old 03-03-2013, 05:27 AM Thread Starter
rtaff
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Jeep went dead a couple of times going down road. After it cooled off a few minutes it would run fine. I noticed the black rubber coating on the box looked like it had been getting hot and melting and dripping on the fender well below the box. I sent the box to a place in Jacksonville Fl. to be rebuilt. They checked the box and said it couldnt be rebuilt. Now they are trying to find another one and not having much luck.
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post #11 of 12 Old 03-03-2013, 12:12 PM
Bigjonh
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My module looked the same way, before I cleaned it up. My jeep runs fine whether it's connected or not. Like I said I am not sure if it's working or not. I do not think the module would cause it to stall. I believe the 82 is the only year with the fender mounted module, apparently quite rare as you found out.
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post #12 of 12 Old 03-04-2013, 05:25 AM
John Strenk
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It could be the position of the stepper motor was in the wrong position when the box was removed.
I think the procedure was to start the engine up let it warm up and when you see the mixture needle move unplug the stepper motor.
This puts the mixture needles close to the correct location. See the nutter bypass for more information on setting the stepper motor.

If you want to get with a different carb, I'd do a little research. A new carter carb can cost as much as a Weber. But a Carter would be a direct replacement. A Weber is a better Carb. Ant then there is a MC2100 to think about.

Also maybe you can rebuild what you have. That's what I did and it runs great...
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