Archived Will not stay running

[turbod]

After changing fuel filter took forever to get the air out of the system, alot longer than ever before. It took longer to prime with handpump also. now it will idle all day long but as soon as you start to drive if you get any speed it will die and then have to bleed the system again. not sure were to start. was told about the pressure switch on the pump and had it tested-- said it was a little low but still in specs. still does it.



any ideas or a checklist to go through to eliminate things? HELP!



Actually I think the truck is mad at me because it knows I am going to order a new one!

 

[blacksheepdiesel]

turbod,



1. Have you checked fuel strainer?



2. Have the rubber sections of the fuel supply & return lines been replaced?



3. Is the gasket on the fuel filter seating correctly?



4. Are all fuel fittings tight (banjo bolts, hose clamps)?



If you are getting air bubbles while bleeding the system after it has died then it is probably #1 or #2.



Trent

 

[CumminsAholic]

I just had the same exact problem when I ran my 96 out of fuel. I've run it out before and no problems, prime it and go, but not this time. I got just from my shop and it died (about 2 blocks after I filled up) so I let it idle for 15 min and I thought that'd clear it out, but it didn't. So I just limped it along and eventually it cleared out and now it runs fine. I think it has a bad lift pump, but I haven't put my gauge on it yet (it's stock so no gauges). I know nothing else leaks or is plugged because it ran great before I ran out, so I'm assuming that's what it is. I'm going to look at it this week, I'll let ya know what I find.

Corey

 

[Joe G.]

If you have a leak on the supply side of the lift pump there may be no fuel evidence. It will be sucking air. Your fuel pressure will be low and unstable. I had a failure with the fuel heater leaking at the electrical connector. The fuel pressure was low and got worse after driving a bit. Another guy I know had an air leak at the input fitting to the heater/strainer assembly. He fixed it for about 50 cents and it has worked fine since then as far as I know.

 

[turbod]

Thanks for all the info. after doing more searches for the problem and all your suggestions i made a list and went to work.



the strainer was OK replaced gaskets



Rubber elbow was replaced-no difference



purchased new fuel lines but after working on it for one night ( no garage- don't get home until after 730pm) i decided to take it to dealer as I need the truck back sooner than i can get it done myself. Its hard getting to the area were the lines are at. Going on vacation in 8 days and need to get camper loaded and ready. Working on it in the dark and out side in the snow is the pitts!



On the other side of the story i finally decided to order a new 2004. 5 they said 8-12 weeks can't wait now!