Engine/Transmission (1998.5 - 2002) Fuel pressure gauge...

[JWHays]

I just bought a gauge to check the LP pressure with. I installed the gauge in the back port and it indicated 0 psi. I unscrewed the gauge and no diesel came from the port. I tried the other (front) port and the same thing happened- no fuel. I spoke with a friend and he said those ports are not blocked. Anyone one know what gives??? Thanks.



... John

 

[Black-Smoker]

Your lift pump is probobly dead. I know that this may be a stupid question but did you bump the starter to cycle the lift pump when you had the gauge installed. Or did you start the truck?

 

[JWHays]

IMHO, there are no 'stupid' or 'dumb' questions...



I installed the gauge then started the engine and ran it until I could get out and look at the gauge. At this point, I loosened the gauge until diesel started leaking out around the threads on the gauge. There was no diesel to be seen.

I then took the gauge off and looked inside the port. I saw a bit of liquid and that's it. At that time, I loosened the other plug, and no diesel came out.

The truck runs strong and without missing or shuddering. It will however bog down sometimes in a turn.

I ordered another lift pump from Hoeldiesel (sic)...

Thanks for the reply. I was wondering if anyone was going to reply to my message.



... John

 

[Loren]

John,



After I installed my fuel pressure gauge, it read zero too.



I took the truck to the dealer to have them test it with a direct-reading gauge. It had to be:

1. A faulty gauge or sender, or

2. A faulty installation, or

3. A faulty lift pump



As it turns out, my lift pump was not putting out any pressure. The mechanic could not understand how my truck could run under that condition.



I took this to be good news, since it meant that I didn't screw up the installation, but the best news was that Dodge would replace my lift pump under warranty. They had one in stock and did it while I waited.



Batesville Dodge, Batesville, Indiana. Great dealership.



I recommend getting a second opinion (direct-reading gauge) on your fuel pressure.



Good luck,

Loren

 

[JWHays]

Re: Pressure gauge...

Thanks for the replies, gents!

Loren, this warranty you spoke of, is this the 100k warranty that Cummins gives or is it an extended warranty?

When I replace the pump, I'm going to bench test it and find out exactly what went wrong with it.

I'm amazed that with all the lift pump problems that there isn't a class-action lawsuit against Cummins. This is totally unacceptable.



... John