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post #1 of (permalink) Old 03-01-2003, 12:49 AM
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replace 4.2 w/ 4.0fi

ive got an 88 wrangler w/ a rattling 4.2(carb) ,i also have a 4.o FI from wrecked 95 (auto ..the 88 is 5 speed.the question is .....what do i need to consider whan swapping these engines...i know about the crank sensor,flywheel,and clutch lever problems..if there are any other things to think about any suggestions would be helpfull... thx in advance
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post #2 of (permalink) Old 03-01-2003, 02:37 AM
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Re: replace 4.2 w/ 4.0fi

Try this link
There is tons of info...

You have to take care of the harness and compter did you get them on the 95 ?

If it's auto and you want to use it with a stick you got to check if the computer from the auto will work..

Try to ask more specific question and BTW welcome to the forum..
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post #3 of (permalink) Old 03-01-2003, 01:07 PM
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Re: replace 4.2 w/ 4.0fi

thx ill check the site you gave me ...yes i do have the computer and harness...
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post #4 of (permalink) Old 03-01-2003, 06:07 PM
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Re: replace 4.2 w/ 4.0fi

You will need to disable the idle overide on the auto's computer.
It is a circuit that advances throttle when at a stop.
Search for or ask "dorfs" (a sometimes ORC BBS member) for more info...
I do recal he said that's the only real difference between the manual and automatic trannie's computers and it's better to get one from an auto due to the ease of shutting of that function if you go manual ... but it is very problematic to try to get a manual's computer to work with an automatic trannie.
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