CaptainEric

Awesome! Sounds easy to do that than drop the tank or pull the entire bed. Appreciate it!

No it's a fass ddrp. So it's in the original location. I have the stock fuel filter. You know thinking about it, my gaskets on the pump could be leaking on the intake side. That would explain why it would be able to pump fuel with pressure and then as it ran dry air gets in the line until it is able to suck more fuel up.. Should I try buying a module from a wrecking yard and replacing it? Or too Risky because those may be cracked?

Thanks! I was thinking about just accessing the tank. Is it easier to lift the bed or drop the tank? When you inspected yours, was the crack pretty obvious? I crawled underneath and was able to sit up under my truck and inspected the module thoroughly with a mirror to see every crevice and could not find anything...

I've tried that. Here is what doesn't make sense. I turn on the ignition. My lift pump moves fuel with 10+psi. I've opened the water valve on the filter housing as it was doing so and no air. It starts up fine. A minute or so into idling or driving it starts to surge like it is running out of fuel. Then if I let it go it will die. I get out, open the water valve on the filter housing and air comes out and I let it bleed until fuel is flowing. It then fires up and runs fine. So here is where it doesn't make sense. If it was sucking air from a fuel line that is cracked or module fittings or anywhere before the lift pump. It would pump air by just turning the ignition on and fill the canister. But since it pumps just fine until its running doesn't lead me to believe its a hose or fitting issue. I've checked the fuel pressure upon ignition activation and when the engine starts. It has adequate pressure. It's frustrating.. I don't want to take it to a shop because the few I've talked to have no clue and said it'll take a couple of hours. So for roughly 200$ in shop labor I might end up where I started. Thanks for all of the advice thus far everyone!

Gotcha. I was thinking my fass ddrp should be able to provide adequate suction.... Now as far as my truck, the ddrp is putting out enough pressure. It's 14-15 at idle. When it first kicks on with ignition is 10ish.. Vp 44 is new as well. There are no leaks I can see. I've replaced my overflow valve. Crawled under the truck and inspected the tank and module and followed the lines. No leaks. I don't know what to do besides burn it. Lol

Thanks guys... I hadn't been on here because it randomly quit acting up shortly after this post until approximately 1 week ago. Now it's doing the same thing again... - - - Updated - - - I have a fass ddrp.... A local diesel shop said they wouldn't put a draw straw because it wouldn't be able to suck enough fuel???? Opinions on this?

Genius! Pure genius! Why didn't I think of trying that! I will try it when I get back to my truck this evening. Ill let you know. Thanks for all the input thus far. - - - Updated - - - The gas cap did not make a difference.

What would cause a copper shim to damage? Also it is not chipped and I don't hot rod it or do any towing. So what would cause the head to crack? - - - Updated - - - Also, if those were damaged how would air pressure build up in the stock fuel filter canister? It does it cold or hot.

It's all stock except for the FASS DDRP and a remanufactured vp 44 about a year and a half ago. It won't stay running when it starts to act up. It will eventually die and to prevent and damage to anything I turn it off when it starts to act up. Then get out and open the valve and air drains out. I've called my local shops and they have no clue either. - - - Updated - - - It was only once in a while a couple weeks ago, now it's every time I start it.

I have a 1999 2500 24 valve.. Approx a year and a half ago I replaced the injection pump with a remaned one from thoroughbred diesel and a fass ddrp lift pump. About 3 weeks ago I fired up my truck after it was sitting for about 2 hours. I drove about a block and it started spitting and sputtering. I opened my water valve on the filter housing and air came out then fuel. It fired up and ran fine after that and was back to normal for a day or two. It then did the same thing again and I again opened the valve and air came out, it then fired up and ran fine. Now it's happening every time I go to drive it. There are no codes and my life pump pressure is superb at 15 idling and 13 WOT. It starts fine. I let it warm up. Listen for it to start running rough, turn it off, bleed the air, fire it up then drive it as long as I need with no problems. I also have just turned the key on and opened the valve before ever starting it and it blows fuel out with great pressure. So it only sucks air when it is running. I can not find any fuel leaks anywhere and my gas cap appears to be functioning properly ( judging by the air pressure when I open it).