MJ Comanche Tech. Stock & Modified. MJ (86-92)
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Who wants more power out of their 87 or 88?

Old 04-28-2014, 12:26 PM
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Will im back to work today so i don't have much free time until sat. But i will be eliminating the c101 before i grab a 90 ecu. I will give a report back asap. Maybe ill get the itch and knock it out on a lunch break. I get a hr lunch so even if i don't get it all at lunch it'll only take a few mins to finish up after
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Old 04-28-2014, 01:58 PM
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wish there was some nice finds for the 97+...like obd2 to obd1 conversion harness or something
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Old 04-28-2014, 05:39 PM
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Originally Posted by rabies View Post
wish there was some nice finds for the 97+...like obd2 to obd1 conversion harness or something
Aw, come on. You're not jealous of our old antique crap are you?
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Old 04-29-2014, 10:29 AM
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lol kinda. obd2 ecu can emission and be picky and throw codes for silly things these days. easier to tune turbo or supercharger off obd1

Last edited by rabies; 04-30-2014 at 08:40 AM. Reason: spelling
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Old 04-29-2014, 07:20 PM
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Possibly dumb question, ecu under driver's side dash correct and not in engine bay?
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Old 04-29-2014, 07:29 PM
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Originally Posted by unidentifiedbomb View Post
Possibly dumb question, ecu under driver's side dash correct and not in engine bay?
That's the dumbest question I've ever heard!!

LOL. JK.

The Renix Jeeps had the ECU mounted under the dash up and to the right of the gas pedal. When they went to a PCM in 1991, they were located in the engine bay.

I'm looking forward to your report back after replacing the ECU. Did you see my ****-poor pic of the easy way to remove it?
Attached Thumbnails Who wants more power out of their 87 or 88?-renix-ecu-mounting.jpg  
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Old 04-29-2014, 07:41 PM
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haha i did, had to zoom out 200% to make it clear. It's just mounted by two bolts? I can see about replacing it next week. Then c101 delete in two weeks.
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Old 04-29-2014, 07:45 PM
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2 nuts hold the bracket to the dash mount. That's where you wanna remove it from. Swap the bracket to the "new" ECU by removing 3 bolts.
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Old 04-29-2014, 07:47 PM
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Thanks cruiser, will report back pm with update if i get to it next week.
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Old 04-29-2014, 08:29 PM
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My two bracket bolts were very tight. Found it best to use a ratchet wrench.
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Old 04-29-2014, 08:37 PM
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Originally Posted by 1arunem View Post
My two bracket bolts were very tight. Found it best to use a ratchet wrench.

You mean "nuts"? And if so, a 10mm ratcheting wrench is the way to go.
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Old 05-02-2014, 08:10 AM
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Yep, meant the nuts on the bracket bolts..
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Old 05-03-2014, 07:59 PM
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So i was goi.g threw a box today and found a spare 89 tcu if anyone needs this pm me. On a side note i still haven't had time to go look for a 89/90 ecu maybe ill have a little time this week
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Old 05-04-2014, 08:41 PM
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So I need to find me a '90 ECU then... Would make a great improvement in my '88 with the stroker.

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Old 05-04-2014, 09:28 PM
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Originally Posted by onlyinajeep726 View Post
So I need to find me a '90 ECU then... Would make a great improvement in my '88 with the stroker.

Oh yeah......
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