FYI guys,

The other day I started my 2005 DMax 2500hd with 1300 mi., backed it out of the driveway and it suddenly stalled. I couldn't restart it and I tried to purge / prime the fule filter with the top mounted pump. Still would not start, so I had it towed in. The tech tells me that I had air in the fuel line for unknown reasons. He was able to start the engine after he purged and primed the fule filter pump as I did, but with the following difference: After fuel bleeds out of the purge screw, close the screw and pump the fuel filter several more times until the pump is very hard to push down. I guess that did it......Still no answer as to why I had air in the system.......Until I'm stranded out at the lake, I guess I won't know if his fix really worked....try it and let me know if you run into this problem and it works......

sounds like the filter was installed incorrectly the first time..didn't purge it right. if they never opened the screw to force the air out (also in the manual) then it will just stay in there, also if the filter isn't on good it can suck in air as well. There is a LOT of pressure right there so its always possible.

I thought that you were supposed to open the screw, pump and let fuel bleed out and then close the screw.........is this order correct?.....the tech tells me to further pump the filter until it gets very hard...

I thought that you were supposed to open the screw, pump and let fuel bleed out and then close the screw.........is this order correct?.....the tech tells me to further pump the filter until it gets very hard...

correct..install filter, open screw, start pumping until air is forced out and fuel is starting to purge..close screw..then pump until its very very stiff.

check out the do it yourself section as well, there is a good write up on it.