Engine/Transmission (1998.5 - 2002) Lift pump shutting off while driving

[HDarga]

On the way to work this morning, my truck started stubling and I noticed I had no fuel pressure. After messing with some things, I found that if I shut the truck off and started it back up, the fuel pump would work for a couple of minutes and then shut off again.



I was only a few mins. from work so I dorove it to work that way. As soon as I noticed the fuel pressure start to drop, I'd shift into nuetral, shut the truck off, then turn it back on. I didn't think to check the codes but I'm thinking a computer problem? Anyone had this before?

 

[JLandry]

Without checking, it's difficult to know if it's the computer or the lift pump. To isolate the problem, you're going to need to check for 12+ volts at the lift pump connector when the fuel pressure drops. If voltage is present, then the pump could be suspect or possibly there's a restriction somewhere in the fuel system (filter?). If you have less than 12 volts, then it could be the ECM or a wiring problem.



THIS THREAD may be helpful to you.



John L.

 

[ALepley]

Whatever you do, do not run that truck when the lift pump shuts off or you are looking at a costly injection pump.