Efi 2.5?

[TheDirtyJeep401]

I was at the salvage yard (As Usual) and the 2.5 i pulled my valve cover off was electronically fuel injected. It was in a Cherokee. So does that mean later year of Cherokees had EFI 2.5? 

[onlyinajeep726]

Yes. http://www.jeepforum.com/forum/f11/cherokee-stock-specs-26256/#post168071
 

Engines

2.5L I4 carburated - 105 hp @ 5000 rpm, 132 ft lb torque @ 2800 rpm - used in 84-85 models
2.5L I4 TBI (fuel injected) - 117 hp @ 5000 rpm, 135 ftlb @ 3500 rpm - used in 86 and updated in 87-90 to 121hp
2.5L I4 MPI (multi-port injection) - 130 hp @ 5250 rpm, 139 ft lb @ 3250 rpm - used in 91-00

GM 2.8L V6 - 115 hp @ 4800 rpm, 145 ft lb @ 2400 rpm - used in 84-86

Renault 2.1L 4cyl. Turbo Diesel - 85 hp @ 3750 rpm, 132 ft lb @ 2750 rpm - used in 85-87

Italian VM 2.5L Turbo Diesel - 140 hp, 236 ft lb torque - used in overseas XJs

4.0L I6 EFI "Power Tech" - 177 hp @ 4750 rpm, 220 ft lb @ 4000 rpm - used 87-90
4.0L I6 MPI "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in 91-95 and updated in 96-01 to 225 ft lb torque @ 3000 rpm (00-01 models use a distributorless ignition system)

[87Warrior]

I would wager to say the 86-90 Renix TBI is electronic fuel injection. It certainly isn't mechanical fuel injection like you would find on a 50's Vette. I suspect you are actually referring to the 91+ Chrysler multi-port fuel injection.

[TheDirtyJeep401]

I would wager to say the 86-90 Renix TBI is electronic fuel injection. It certainly isn't mechanical fuel injection like you would find on a 50's Vette. I suspect you are actually referring to the 91+ Chrysler multi-port fuel injection.

 

 

Yes. http://www.jeepforum.com/forum/f11/cherokee-stock-specs-26256/#post168071

 

 

Engines

 

2.5L I4 carburated - 105 hp @ 5000 rpm, 132 ft lb torque @ 2800 rpm - used in 84-85 models

2.5L I4 TBI (fuel injected) - 117 hp @ 5000 rpm, 135 ftlb @ 3500 rpm - used in 86 and updated in 87-90 to 121hp

2.5L I4 MPI (multi-port injection) - 130 hp @ 5250 rpm, 139 ft lb @ 3250 rpm - used in 91-00

 

GM 2.8L V6 - 115 hp @ 4800 rpm, 145 ft lb @ 2400 rpm - used in 84-86

 

Renault 2.1L 4cyl. Turbo Diesel - 85 hp @ 3750 rpm, 132 ft lb @ 2750 rpm - used in 85-87

 

Italian VM 2.5L Turbo Diesel - 140 hp, 236 ft lb torque - used in overseas XJs

 

4.0L I6 EFI "Power Tech" - 177 hp @ 4750 rpm, 220 ft lb @ 4000 rpm - used 87-90

4.0L I6 MPI "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in 91-95 and updated in 96-01 to 225 ft lb torque @ 3000 rpm (00-01 models use a distributorless ignition system)

Those would be it, now I want it..... 

[Oyaji]

I would wager to say the 86-90 Renix TBI is electronic fuel injection. It certainly isn't mechanical fuel injection like you would find on a 50's Vette. I suspect you are actually referring to the 91+ Chrysler multi-port fuel injection.

 

I suspect so too.

 

Shoot, I have an old 1967 VW Type 3 station wagon that has multi-port EFI. It's analog and not digital, but still EFI.  :)

[TheDirtyJeep401]

Now comes my next question, can I take all the peices off of it for the multi port, and put it on my 2.5? Or would I have to get the whole engine? I know there other peices that I need but didnt know if the blocks are the same.

 

I like the Muti Port design and would like to put it my Comanche sometime down the line of years. Never seen one before (Although I never really payed attention either)

Thanks

[onlyinajeep726]

You can, but you'd need to swap computer, harness and likely inside dash harnesses too.  Block and head should be same, but I'll let another member chime in on that part.  It's something I contemplated in my '86 but for all that work, I just went ahead and threw in a 4.0 instead.

[Comanchemodder]

Some more items:

 

1) Higher fuel pressure required, ie. new fuel pump.

2) MPI flywheel is different from Renix

3) Ditributor is different

4) as stated above, ECU change out required (possibly all the sensors too?)

 

I am planning on this conversion myself but am waiting to get everything in order before moving forward.

 

Some great info from my post at 4WDmechanix:  http://forums.4wdmechanix.com/topic/227-25l-tbi-jeep-will-an-mpi-conversion-require-a-new-flywheel/