Mutliport Fuel Injection Junkyard Swap
Rescue Diver
Full Time Jeeper
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- Kansas City
- Vehicle(s)
- 1979 CJ-7 with a fiberglass body and 1982 wide track axles, 258 I-6 with a 1995 4.0 head, HEI distributor, Motorcraft 2100 Carb, T-18 wide ratio tranny, Super Lift Springs and 33s, a 1997 BMW 328i, and a 2010 REDLINE CONQUEST TEAM Cyclocross Bike. :)
I know there are numerous ways and kits available to retrofit Fuel Injection on an old CJ, but I'd like to keep this thread exclusively about doing a Junkyard swap of the OBDI Multiport Fuel Injection from a 1992 to 1995 Cherokee or YJ, what parts are required, and how it's wired in.
At least for now, I still plan to stay with the carburetor when I install my new 4.7L stroker, but curiosity got the better of me.
Thanks to the 4.0 engine I purchase for my Stroker Project, I now have a 1995 4.0 intake, throttle body, injectors and throttle position sensor. I've been trying to find out specifically what parts I'd need to complete a junkyard swap. I'd need a crank position sensor and fly wheel, and I'm assuming I'd also need an oxygen sensor with a bung welded in my down pipe. Does the 1995 MPI have one oxygen sensor or two? What kind of electric fuel pump works best for this, a stock(In tank) pump, or an good external. If stock, will a stock pump assembly even work in a CJ tank??? If external, what pressure and gallons per hour are required? What about the fuel pump cut off. Will the computer still cause the pump to shut off after a few seconds to pressurize the lines when you first turn on the key if you don't start the engine? What about ignition. Is it mandatory to have the ignition timing computer controlled using a stock distributor from the donor vehicle, or can you run a manual adjust distributor and set the timing yourself?
At least for now, I still plan to stay with the carburetor when I install my new 4.7L stroker, but curiosity got the better of me.
Thanks to the 4.0 engine I purchase for my Stroker Project, I now have a 1995 4.0 intake, throttle body, injectors and throttle position sensor. I've been trying to find out specifically what parts I'd need to complete a junkyard swap. I'd need a crank position sensor and fly wheel, and I'm assuming I'd also need an oxygen sensor with a bung welded in my down pipe. Does the 1995 MPI have one oxygen sensor or two? What kind of electric fuel pump works best for this, a stock(In tank) pump, or an good external. If stock, will a stock pump assembly even work in a CJ tank??? If external, what pressure and gallons per hour are required? What about the fuel pump cut off. Will the computer still cause the pump to shut off after a few seconds to pressurize the lines when you first turn on the key if you don't start the engine? What about ignition. Is it mandatory to have the ignition timing computer controlled using a stock distributor from the donor vehicle, or can you run a manual adjust distributor and set the timing yourself?