MJ Comanche Tech. Stock & Modified. MJ (86-92)
All discussion regarding the Jeep Comanche, the pickup truck related to the Cherokee platform.

Who wants more power out of their 87 or 88?

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Old 11-03-2016, 06:27 AM
  #121  
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Ive got one for $75 shipped.
Old 11-03-2016, 07:36 AM
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Originally Posted by Thexjfiles
Ive got one for $75 shipped.
That's a decent deal.
Old 11-03-2016, 06:29 PM
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Originally Posted by cruiser54
You'll like it. Junkyard is gonna be your best bet.
all the junk yards around here crushed all the old stuff, might have to hit up Thexjfiles.
Old 11-03-2016, 11:17 PM
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Originally Posted by Gmaster
all the junk yards around here crushed all the old stuff, might have to hit up Thexjfiles.
Go for it. I would.
Old 06-22-2017, 03:29 PM
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I just installed a "428" '90 ECU into my manual trans "87 and am very impressed in the supposed 6 horsepower increase. At 3rd gear it pulls noticeably harder. My fuel gage previously stuck past Full now works. $55 well spent.
Old 06-22-2017, 03:36 PM
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Originally Posted by sequit@sbcglobal.net
I just installed a "428" '90 ECU into my manual trans "87 and am very impressed in the supposed 6 horsepower increase. At 3rd gear it pulls noticeably harder. My fuel gage previously stuck past Full now works. $55 well spent.
Grab every one you see in the JY!!!
Old 09-23-2017, 07:52 PM
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ok, found a 1990 on craigslist and its an automatic

please confirm if this is right.. (only the ...428 model will work in my 88xj auto?)

i have an 88xj automatic so i want the ecu from the 90 also automatic with model number ending in 428 ??

429 is manual transmission and that one wont work in my 88xj auto ?

the guy is asking 80$

i just dont want to spend 80$ on an ecu that doesnt work cause i didnt verify the numbers

marc
Old 09-23-2017, 08:02 PM
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im a bit confused cause of this video, ecu and abs units look just the same

Old 09-23-2017, 09:06 PM
  #129  
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the reason i ask this,

on oreilly i get 4 results 2 manual and 2 automatic and both automatic seem to have different numbers

https://www.oreillyauto.com/shop/ign.../jeep/cherokee

marc
Old 09-24-2017, 01:02 AM
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Originally Posted by LadyKenai
ok, found a 1990 on craigslist and its an automatic

please confirm if this is right.. (only the ...428 model will work in my 88xj auto?)

i have an 88xj automatic so i want the ecu from the 90 also automatic with model number ending in 428 ??

429 is manual transmission and that one wont work in my 88xj auto ?

the guy is asking 80$

i just dont want to spend 80$ on an ecu that doesnt work cause i didnt verify the numbers

marc
It will work fine.
Old 09-24-2017, 05:16 AM
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thank you
Old 10-23-2017, 04:58 PM
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Cruiser: Any reason you say to remove the 10MM nuts to pull the ECU with the mounting plate? I found it way easier to take the two small screws out of the plate and drop the ECU without removing the plate.

Also, I'm in need of an ECU for a manual trans 4.0 (dead injector driver) if someone has an '89 or '90 ECU to sell.
Old 10-23-2017, 06:49 PM
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Originally Posted by '90Cherokee
Cruiser: Any reason you say to remove the 10MM nuts to pull the ECU with the mounting plate? I found it way easier to take the two small screws out of the plate and drop the ECU without removing the plate.

Also, I'm in need of an ECU for a manual trans 4.0 (dead injector driver) if someone has an '89 or '90 ECU to sell.

YOURS HAS LIKELY BEEN REMOVED BEFORE. sHOULD have been 3 screws that way with the third one being an absolute *****.

Buttstripe here on cF likely has an eCU for you.
Old 10-24-2017, 11:58 AM
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Originally Posted by cruiser54
YOURS HAS LIKELY BEEN REMOVED BEFORE. sHOULD have been 3 screws that way with the third one being an absolute *****.

Buttstripe here on cF likely has an eCU for you.
I didn't have a third screw in either one and didn't notice a spot for it, guess I got lucky then.

Yup. We talked yesterday and probably meeting up Wed to get one.
Old 08-04-2018, 01:12 PM
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Anybody have a line on these ECUs? Looking for a 429 for my manual.


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