how much do 4.0L fuel injection setups go for?

All 4.0's are fuel injected. Are you talking about the Mopar kit for the 4.2? Your question does'nt make sense. :confused:

I'm pretty sure when Jeep went from the 4.2L to the 4.0L that they fuel injected all the 4.0L's so that's what I'm looking for.

Hence what I said above. They are all EFI. You're still being cryptic though. Looking for what? New, used, kit, all, part?

Let me give this a try even though I don't really understand either.

Mopar MPI for a 4.2l ~ $2000
Howell FI for a 4.2 ~ $1000

4.0l engine complete ~ $300-$1000 depending on condition
4.0l FI only ~ $300 from a yard because you need most of the sensors and computer anyways

Is this what you wanted?????

ya. thanks. $300 for a used factory EFI setup sound good.

Originally posted by LOPPY
All 4.0's are fuel injected. Are you talking about the Mopar kit for the 4.2? Your question does'nt make sense. :confused:

What year started FI on the Yj's?

Also, was it hard ot put the 350 in your YJ? Did you go with FI on the 350 or a TPI?

Originally posted by Emmettology 101


What year started FI on the Yj's?

the 6cylinder YJs got fuel injection in 1991 but the Cherokee(XJ) and Comanche(MJ) got the 4.0L and EFI years before the YJ.

Originally posted by YJ4LIFE

the 6cylinder YJs got fuel injection in 1991 but the Cherokee(XJ) and Comanche(MJ) got the 4.0L and EFI years before the YJ.

Darn, so the 90 YJ I am looking at is a carb'd 4.2......

Originally posted by Emmettology 101


What year started FI on the Yj's?

Also, was it hard ot put the 350 in your YJ? Did you go with FI on the 350 or a TPI?

Yup, 91 as stated above. The 90 you're looking at is most likely a carb'd 4.2. :( The 4.0 is a fine motor. My bud Keith Strong has a HO4.0 in his 95, running full width 8 luggers, 38.5's T18 and Atlas. I was suspect if it had enough juice for all that, but no doubt, it does! Good motor.

My swap was a piece of cake. I pulled a 91 TBI350 out of a van with 55k miles on it. 85-95 was the TBI (throttle body) and 95-on are the sweet Vortec's.

IMNSHO, if you have a YJ with a dead 4.2, DO NOT spring the major cash for a rebuild + mopar kit etc. Waiste of dough. Get yourself a small block and have fun.
:D