1990 jeep comanche with a 1991 4.0 motor swap

[codymanche]

can it be done? is it plug and go? i need strait answers and quick? and if so i need some one who has done it and can show me and or tell me whats gotta be done. this is a big one! I'm sure its been talked about before. just short on time!!!

[mj Mike]

they will swap, butt not Quick, engine blocks are the same,

head's, intake's, throttle body's, fuel rail's & all the wiring are different

[codymanche]

Like how different I been hearing its a plug and go system is it hard to do

[jimoshel]

For a quick an cheap swap, just change the sensors. Sit the 2 engines side by side and swap everything that's different from the '90 to the '91.

[codymanche]

But are the sensors plug and go

[jimoshel]

If you mean will they fit in the holes, yes. Keep the sensors with the ECU you're using. How hard would it be for you to unscrew one and see?

[codymanche]

But the computers are the same and the everything except the sensors

[xjrev10]

But the computers are the same and the everything except the sensors

do you talk fast in real life? i find myself reading your posts fast :redX: :yes:

[NewfieMJ]

I'd just swap the 90 intake manifold , be happy it had a fresh gasket and no issue with it being a plug and play , assuming the distributor pick-up plug-in is the same .

[codymanche]

Well ima try one more thing before I do it but diffantly hope its plug and play

[cody4359]

if you take the wiring from the HO motor and swap it with the renix one then yes it is plug and play, but then you will have lots of little odds and ends like making the pig tail for the front HO harness to the rear renix harness, then you have the issue of your fuel guage not reading correct or accurate. alson on mine i swapped steering colums so i caould have tilt and cruise control. i started this swap last october thinking i would have it done in a week or 2, now i have been lazy and busy with work but it finally runs. a concrete floor would have made me more willing to work on it but its definatley a bigger project than i thought. can it be done-yes. but i should have waitied cause i just cound a 88 with 99 drivetrain, interior, doors etc for $4200, and its lifted with 33s.........

 

ps, i also went from a 2wd, 4 cylinder to 4x4 4.0 so maybe that was a bit more work.