Who wants more power out of their 87 or 88?
04-22-2014, 02:55 PM
#31
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Year: 1990
Model: Cherokee (XJ)
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04-23-2014, 01:40 PM
#33
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Year: 1988
Model: Cherokee
Engine: 4.0l
Picked up an ECU out of a 1990 model today. Hope to install it soon and hopefully see some improvement in power.. Will report back...
04-23-2014, 03:55 PM
#34
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04-23-2014, 05:18 PM
#36
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04-24-2014, 06:53 PM
#37
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Year: 1990
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This should help you guys when swapping ECUs: Leave it on the bracket.
04-25-2014, 03:02 PM
#38
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Year: 1992
Model: Cherokee
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Cody reported back last evening on changing his TCU from the standard 87 model to an 89 model I had from a parts Jeep.
Better shift points with less lugging and definitely noticeable.
I knew they changed the TCU after 87 due to customer complaints, and 88 and later seem to work great. My wife's 88 shifts like my 90.
Better shift points with less lugging and definitely noticeable.
I knew they changed the TCU after 87 due to customer complaints, and 88 and later seem to work great. My wife's 88 shifts like my 90.
04-25-2014, 04:54 PM
#39
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Year: 1992
Model: Cherokee
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Also i believe my mj is equipped with 87 electronics because i have the c101 my tcu had 87 in the part numbers and in the same location the 90 tcu had the numbers 90. I also looked at the parts numbers on my ecu it has 87 in the first few digits. Maybe a coincidence but i don't think so. I will be looking through ecu's tomorrow and I'll be checking this numbers so maybe we will have a sure fire way to id are ecu's
04-25-2014, 04:55 PM
#40
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Year: 1990
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We're thinking the 4 digit number is year and weak of the year.
9022 being the 22nd week of 1990.
9022 being the 22nd week of 1990.
04-25-2014, 05:14 PM
#41
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Ok ya so my 88mj has a week47 of 87 ecu. Would it be safe to say the if you have c101 then you got the 87 ecu? I have a friend with a 88xj with c101 ill peek at his ecu when i get a chance
04-25-2014, 10:23 PM
#42
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04-26-2014, 05:10 PM
#43
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Year: 1988
Model: Cherokee
Engine: 4.0l
Just completed the swap from 88 to 90 ECU (marked 8942 so I'm assuming late 89).
For me UNDENIABLY MORE POWER!!
To be fair, since I got the 88 about a month or so ago, I thought it was either a bit down on power or just weak (only 177 or so hp). Pulling long hills was a chore and general accel was not wonderful (especially pulling my 16ft bass boat).
Now, there is a distinct difference in 0-60 accel and pulls up hills do not seem so difficult(have one major one in my neighborhood I gauged it by).
Not to mention, idle quality is noticeably better. Mine was not bad, but it is much smoother now. I was assuming I needed to clean my IAC previously.
That being said, perhaps my ECU was not up to peak performance so I may be seeing more than normal gains.
Your results may vary, however, I would recommend the swap to anyone with an 87 or 88.
Thanks Cruiser54!!!!
For me UNDENIABLY MORE POWER!!
To be fair, since I got the 88 about a month or so ago, I thought it was either a bit down on power or just weak (only 177 or so hp). Pulling long hills was a chore and general accel was not wonderful (especially pulling my 16ft bass boat).
Now, there is a distinct difference in 0-60 accel and pulls up hills do not seem so difficult(have one major one in my neighborhood I gauged it by).
Not to mention, idle quality is noticeably better. Mine was not bad, but it is much smoother now. I was assuming I needed to clean my IAC previously.
That being said, perhaps my ECU was not up to peak performance so I may be seeing more than normal gains.
Your results may vary, however, I would recommend the swap to anyone with an 87 or 88.
Thanks Cruiser54!!!!
04-27-2014, 09:51 AM
#45
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Year: 1990
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