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Motor swap

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Old Sep 11, 2010 | 10:02 AM
  #1  
xjdanspringer's Avatar
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From: ohio
Year: 1987
Model: Cherokee
Engine: 4.0L
Exclamation Motor swap

ok the other day the motor went.... R.I.P. 4.0L

but anyway i found a motor and its goin for $200 the guy would sell me.... its the same motor but its out of a 96 not a high output just a regular... would that go together well with computer and all that fun stuff like that? because i have no idea id hate to buy it and i cant put it in...
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Old Sep 11, 2010 | 10:09 AM
  #2  
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From: Summerville, Ga
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
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please somebody correct me if im wrong, but i think that its probably a H.O. if it came out of a 96
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Old Sep 11, 2010 | 10:10 AM
  #3  
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From: gilman,il
Year: 95
Model: Cherokee
Engine: 4.0
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if its a 96 motor it would be an HO.
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Old Sep 11, 2010 | 10:12 AM
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All 4.0s after 90 are HO.If its going in the 87 then you will need the computer.
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Old Sep 11, 2010 | 10:12 AM
  #5  
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o alright well would it still fit and work?
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Old Sep 11, 2010 | 10:15 AM
  #6  
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where can i find a computer at least a used one?
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Old Sep 11, 2010 | 10:16 AM
  #7  
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Originally Posted by xjdanspringer
o alright well would it still fit and work?
Absolutely.And you'll enjoy the extra power.
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Old Sep 11, 2010 | 10:19 AM
  #8  
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From: gilman,il
Year: 95
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Engine: 4.0
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Originally Posted by troy fritz
absolutely.and you'll enjoy the extra power.

big differance. U will def notice.
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Old Sep 11, 2010 | 10:26 AM
  #9  
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Year: 1987
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ok well do u think a 94 4.0L jeep grand cherokee computer fit and work?
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Old Sep 11, 2010 | 10:33 AM
  #10  
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Year: 1987
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and also will the old wiring plug into the new?
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Old Sep 11, 2010 | 10:35 AM
  #11  
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From: gilman,il
Year: 95
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not to sure about wiring. but someone will chime in.
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Old Sep 11, 2010 | 10:45 AM
  #12  
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From: ohio
Year: 1987
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well i just took some pics of my wiring in the 87 motor ill post them as soon as my camera charges bk up
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Old Sep 11, 2010 | 12:20 PM
  #13  
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From: CT.
Year: 88
Model: Comanche (MJ)
Engine: 4.0 HO
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Here's some messages BlueXj sent me when I did my 94 to 88 engine swap.

use the Renix head and manifolds and you will have little or no computer problems. Also retain the Renix CPS too.

Port shapes don't match well but most important the two types of throttle bodies are incompatible. The signals will just confuse the Renix computer It may start but will not accelerate or decelerate and idle would be irratic.

So it will work if you use the renix throttlebody and intake with a renix head.
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