Question about 1994 Dodge Ram 2500

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1994 Dodge Ram 2500, Cummings engine, 170,000 miles, fuel and air filters clean. Engine runs normal until warmed up after several miles of driving...then begins to run rough...and then quits as if starved for fuel. Engine restarts easily after stalling and can be driven at slower speeds. This problem is very sporadic. I have also cleaned the fuel shutoff solenoid and removed the old boot.

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Does that 94 have the two fuel pumps on it? If it has the fuel pump on the side of the block and the high-pressure fuel pump on the top, I could almost bet that the one on the block has a check valve going out. Seen I guy spend $700.00 on a new pump and injectors and didn't bother to test the delivery pump. If it does have the primary pump on the block and the check valve goes bad when cold it would run fine and when it gets hot it loses it's prime, it's easy to test just pull the fuel pump off the block and plug the fuel line both sides and while you have it out push down on the actuator with your finger on the suction side and one on the pressure side, if the pump fails to hold vacuum for more than a minute replace it. Otherwise it will destroy the pressure fuel pump and that is expensive. As well the shut off solenoid can be taken apart on some of them and on the back side it has a round disk like on a started solenoid remove the two screws that hold them on clean the round disk with sand paper and the to contact points as well if there is a burr sticking out on one of the contacts file it off with a file then sand it down. Some of the fuel shut off's come apart from the front, either way it's a easy thing to check on both and could save you some big money. Also please rate me as I am a mechanic not a typist so it takes me some time to do this, fact is I could of done what I told ya already if I had the truck. Those Cummins engine was the cats meow when they came out.

Posted on Jul 26, 2009

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Pump may need recalibrating or service

Posted on Jul 26, 2009

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====
Have you try Amsoil diesel treatment?
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====
I will ran the tank below 1/4 and fill up on NON bio-diesel blend.
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====
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