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MOPAR 4.2 EFI
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CJMAN
New User
| Posts: 2
| Joined: 08/08
Posted: 08/28/08
07:47 AM
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I RECENTLY PURCHASED A 1986 CJ7 FOR PARTS. IT HAD A DANA 44 REAR AXLE AND THE MOPAR EFI INSTALLED. I WILL PUT THE AXLES ON MY 1982 SCRAMBLER. I DON'T KNOW ABOUT THE EFI THOUGH. I'VE READ EVERYTHING I CAN FIND ABOUT IT AND IMPROVED PERFORMANCE SEEMS SURE BUT WHAT DOES IT DO FOR GAS MILEAGE? BETER? WORSE? SAME?
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esanchez
Administrator
| Posts: 198
| Joined: 06/06
Posted: 08/29/08
11:53 AM
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I don't know this for a fact, but I would imagine the fuel injection would improve the fuel economy considerably. I mean, it's never going to be a Prius, but I would guess it would probably give you about 2 mpg better. Anyone else have the FI kit on their 4.2?
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Posted: 09/05/08
04:22 AM
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i have a 4.0 with the throttle body injection. i average 20mpg. a deffinate bonus to using efi rather than a carb, is no gas sloshing around in a fuel bowl, so your motor will never be starved for gas. as far as injector maint. goes, i just dump in some stp and shoot some carb and choke cleaner into the throttle body.
I work to support my Jeep
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puter413
New User
| Posts: 2
| Joined: 09/08
Posted: 09/07/08
06:43 AM
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Standard for 4.0 is mpi, 6 injecters. They don't get good milage, about 18 max in a jeep.
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esanchez
Administrator
| Posts: 198
| Joined: 06/06
Posted: 09/08/08
02:59 PM
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 puter413:
Standard for 4.0 is mpi, 6 injecters. They don't get good milage, about 18 max in a jeep.
Yeah, but I think the old carbureted 4.2s got something like between 12-15!
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