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Old 03-13-2014, 10:12 PM   #1
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swap 4.0 into cj

Ive recently bought a 95 grand cherokee to swap drive train into my cj. Do i just use everything including the harness and ecm ?

One concern i have is that the transfer is awd. Should i get a regular transfer?

The other is the security feature it has when battery dies, the door locks have to be locked and unlocked using the key before it will start. Can i bypass that feature?

Anything else my inexperience is overlooking?

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Old 03-13-2014, 11:21 PM   #2
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Ive recently bought a 95 grand cherokee to swap drive train into my cj. Do i just use everything including the harness and ecm ? One concern i have is that the transfer is awd. Should i get a regular transfer? The other is the security feature it has when battery dies, the door locks have to be locked and unlocked using the key before it will start. Can i bypass that feature? Anything else my inexperience is overlooking?
That's a tough one with the security option and on the transfer case I would switch that out you don't want your jeep in 4 wheel all the time. But the ECM will probably know you did that too!!! I thought about doing something like that before but I like simple not electronic.

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Old 03-14-2014, 11:19 AM   #3
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Thx. Yeah i was thinking the awd was going to be a bad idea. I hadn't thought about the ecm picking up on it being swapped out though. The more i rack mutt brain about the security feature, the more i think about starting with an easier adaptable harness.
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Old 03-14-2014, 03:53 PM   #4
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to me,one of the greatest things about a cj over the later models was the much simplier wiring..
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Old 03-14-2014, 05:24 PM   #5
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I understand that. Think i was dreaming about driving it daily and thought fuel injection would make it more reliable and less cold natured. It does come with its own problems tho. So is there carb'ed 4.0s with a normal distributor ? Id consider that too.
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Old 03-14-2014, 05:35 PM   #6
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I understand that. Think i was dreaming about driving it daily and thought fuel injection would make it more reliable and less cold natured. It does come with its own problems tho. So is there carb'ed 4.0s with a normal distributor ? Id consider that too.
Yeah you should be able to find a regular distributer for it. And as a carb you can find a holly single barrel for it that would fit the intake.
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Old 03-14-2014, 05:52 PM   #7
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Ic. The jeep im starting this project with is jist a shell. Doesn't have a harness currently.
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Old 03-14-2014, 08:23 PM   #8
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Ic. The jeep im starting this project with is jist a shell. Doesn't have a harness currently.
Ok yeah I would order a wire harness from like Drive off-road or somebody for the Cj get an HEI distributer from like summit racing or jegs and find a good carb like a holly then you should be good to go. I under stand the thought of fuel injection it's way better in climate change and better fuel mileage. But if that ECM takes a dump your stranded. The other option is find a different ECM for that engine like out of a regular Cherokee that didn't have all that other bs.
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Old 03-14-2014, 11:19 PM   #9
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i built a 4.6L stroker and didnt change any wiring. my YJ is a 1990 and my motor is a 93. I dont know how much different any woring would have been, but i know with all the mods i did to the motor, i eliminated ALOT of BS wiring and emmissions i didnt need anymore. the motor runs great minus the fact i made the mistake of putting a weber on the motor instead of a MC2150. But that is in the process of being changed.
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Old 03-15-2014, 12:54 AM   #10
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i built a 4.6L stroker and didnt change any wiring. my YJ is a 1990 and my motor is a 93. I dont know how much different any woring would have been, but i know with all the mods i did to the motor, i eliminated ALOT of BS wiring and emmissions i didnt need anymore. the motor runs great minus the fact i made the mistake of putting a weber on the motor instead of a MC2150. But that is in the process of being changed.
Ic. Did u make an adapter for the carb or use a 4.2L intake?
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Old 03-16-2014, 12:21 AM   #11
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clifford intake. only one that i could find for a carb'd 4.0. will eventually prolly swith to a 2000+ intake and 62mm throttle body with ford #19 injectors. but the MC2150 will go on first...for a while
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Old 03-19-2014, 09:39 AM   #12
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Contact someone like Painless wiring and see if they have or can build a harness to your specifications. I have gone the carb'd way using the Weber, Motorcraft and Carter carbs and I can guarantee my fuel injected motor is much less of a pain in the butt than any motor with a carb. Just my two cents.
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Old 04-14-2014, 08:15 PM   #13
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Don't forget the front pumpkin of cj's is on opposite side of later jeeps.

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'76 CJ7
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'99 TJ
It's red too.
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