No Fuel??

[chrisschreurs@]

Ok. So I've been working on this truck a while now. 86 F350 CC DRW 6.9idi. I've replaced the injector caps and orings and lines. Rebuilt the oil cooler(that was fun). New front fuel tank(both were rusted, however, I've only replaced the front tank for now. I got it running and drove it around, Realized my front brakes weren't working. Replaced the calipers and master cylinder. Drove around some more and it was running great. Later that day, it started, idled rough, and died. I can fill the fuel filter and get it to start. I've put a new lift pump on as well.
My guess is that there is something wrong between the lift pump and the fuel tank. I can disconnect the line from the back of the fuel filter housing that comes up from the lift pump and fill it with WD40 and it will "squirt" it back out, but hardly anything after that if at all.
Any suggestions?

 

[poppop]

I had an 86 that had that problem.The fuel line connecter at the fuel tank was bad, it let air in the fuel line and ran the filter dry.

 

[Agnem]

A pretty common problem is when the fuel level in the tank gets low, you will start to suck air. This happens when the pickup tube degrades. Try filling the tank full and see if the problem goes away for a while.

 

[howards@howard]

Air in fuel line

On my 86 I found a rot hole on the fuel pick up tube on the front tank and the back one was not much better.

I also ripped out the water separator which is prone to letting air in also and installed a cheap electric fuel pump on a momentary switch on the dash for bad days