Archived 02 No fuel pressure

[JWinningham]

02 Cummins 3/4 ton ext. cab 4x4. No fuel pressure. Have changed injector pump, lift pump, fuel pump, fuel pressure gauge, fuel line from tank to the fuel pressure gauge. Any suggestions.

 

[BDaugherty]

The word "Cummins" does not have a "g" in it.





Run a hose from the inlet of the transfer pump into a bucket of clean fuel. If you get fuel pressure that way, you have just shown that there is a restriction in the pickup assembly. Or no fuel in the tank.



Remove the banjo bolt from the side of the VP44 nearest to the front of the truck. It will have a spring and a check ball inside. You can clean it with compressed air and solvent. This is your overflow valve. If the spring is broken or collapsed, fuel will flow freely back to tank.



If the first 2 ideas don't work, put everything back and run your return line into the bucket of clean fuel. If you see lots of air bubbles, you are sucking air on the supply side.



Does the truck run?

 

[Missouri Mule]

Is there fuel in the tank?



Is power getting to the lift pump?



Are grounds good for components you have changed?



If answers are yes, crack injector lines at the injectors to see if you got any air in the system.

 

[JWinningham]

Thanks for getting back with me. Yes the truck does run, just not anything like it should. I had already done everything you suggested, yesterday I replaced the injector pump again and immediately the fuel pressure gauge went up to 15 on an idle and goes down to about 9 pulling the hills. This makes the 3rd injector pump and its being drove today so we'll see what happens from here. Again thank you for any help that you can give me.

 

[Mishkaya]

It is a worthwhile investment to get an aftermarket lift pump (FASS, Airdog... ), as the stockers are hardly worth anything. Also, where are you getting your IP's from? I have had to replace the one on my '02 when it took a dump at around 70k, but haven't had any issues with it since (over 3 years and 60k). Good luck.