Engine/Transmission (1998.5 - 2002) help please

[Kurt Henzler]

when i bump my starter and do not start the engine, i can not here the lift pump running. the truck runs great and never had any problems for 55k. does it only run when you are changing the fuel filter and the fuel filter container is empty?or do i have a problem? thank for any input. i have not installed a fuel pressure guage yet

 

[TomGolden]

I do not recall being able to really hear my OEM lift pump when doing the starter bump thing after changing fuel filters either. I didn't have an FP gauge until 45K miles, and as soon as it was installed, I learned my lift pump was dead... ... no idea how long it had been dead, but the truck had been running perfectly up until that moment.



By the way, I now have a Carter pusher pump. Man, can you hear that thing run when doing a starter bump can you say LOUD!!!???



I would say, do at least 3 - 4 starter bumps when changing the fuel filter, maybe 5 or even 6 if you completely drain the fuel bowl, just to be extra safe, then start the truck and let it idle for at least a full minute before driving it anywhere.



Early on, I goofed and forgot to bump the starter... . fired the truck up after a fuel filter change, about 10 seconds later, the engine died. Air bound... ... can you say Now, I always let it idle/run for at least a full minute before I drive anywhere, just in case it does get air bound, I am still sitting in my driveway where I can work on it instead of in the middle of traffic somewhere.



Hope this helps.



Tom

 

[BFC]

Originally posted by Kurt Henzler

when i bump my starter and do not start the engine, i can not here the lift pump running. the truck runs great and never had any problems for 55k. does it only run when you are changing the fuel filter and the fuel filter container is empty?or do i have a problem? thank for any input. i have not installed a fuel pressure guage yet

Lift pump is dead, check it ASAP. It doesnt know if you changed the fuel filter or not, if you bumped the starter you should have heard it.



Glenn

 

[Kurt Henzler]

thanks for the help, it is running , just could not hear it with the door closed.

 

[LSMITH]

Just because it is running does not mean it is making pressure... ... Get it checked out.

 

[KenHokie]

A quick and "dirty" way to see if the LP is running is to open the drain valve on the fuel filter while the engine is running. If the LP is providing pressure, diesel will flow out all over the ground. I know this because my drain valve stuck open once and I dumped about 2 gallons of diesel onto the garage floor be I realized what had happened. As everyone has recommend, get a FP gauge. Even though replacement of the LP and VP are covered under the 100K warranty, the warranty doesn't cover the frustration of having your truck quit in the middle of the road because a bad LP has killed the VP. :{