Mopar Fuel Injection

Jul 27, 2003 4 Replies

I installed the Mopar fuel injection kit on my '84 CJ7 258 6 cylinder stock engine. It is a major improvement in performance and reliability. Although I kind of miss the eractic nature of my old Jeep. I have driven the vehicle for 19 years, so, I guess, it is like a marriage--you get used to the bad habits and miss them when they are gone.



The problem is when my gas tank gets to 1/4 tank or below, it dies coming out of a turn and I hear a whining noise, then it picks up. I am certain it is because the gas is sloshing to one side, the fuel pump is pumping air (whining noise), then when the gas stabilizes it gets gas and picks up.



How do I fix this? Is there a reservior I can install?


Where did you mount your fuel pump? It should be close to the fuel tank, as low as possible in relation to the tank. (Mine is mounted on the inside of the right side frame rail). Also, CJ fuel senders are notoriously inaccurate. At

1/4, you may be closer to empty than you think.

The "free" solution is not to let your tank get that low. It is a bad idea to let these pumps run dry. They will not self prime.

Robert Bills KG6LMV Orange County CA

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My '81 with the Mopar MPFI kit doesn't do this.

Yikes!! Your pump is too high in relation to your fuel tank. You want it closer to the bottom of the tank. Electric pumps like to push fuel, not suck it. You are asking for problems where it is.

Re-mount your pump on the inside of your right frame rail, just forward of the rear axle (where it straightens), with the fuel filter downstream.

Robert Bills KG6LMV Orange County CA

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It has been there for 4 years, and counting. I did replace the pump recently, then found I was really out of gas. Mrs. CRWLR will be very annoyed to learn that I paid over a hundred bucks to fill the tank, so keep this hidden from her.

I mounted the pump where the distructions said to put it, I think.

I will have to look at your location, but I don't think I can put the pump inside the frame rail, and any lower than I already have it, and I will tear the damn thing off. I also have issues with the right side frame rail because that is where the hot exhaust system is.

My system is such that I draw fuel through the filter, then pump clean gas up to the motor. Dirt and chunks that build up in the gas tank are stopped by the filter, assuming it actually works.

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