primalurges

True. First time I was going to change my fuel filter I tried disconnecting it and truck kept running, a little rough but kept idling.

BadFish523

Really? I don't think it will run with it disconnected.....

Hongstertruck

Thanks man, I'll give that a try the next time.

WIF-150

Ok didnt know that. Still not the FPDM as it runs great like I've said all the time except the starting issue, that I can duplicate after it sits. Plus I'm losing fuel pressure with key on truck off, so its bleeding back into fuel pump or leaking injector. Next thing I can try is put a gauge on fuel line and isolate the pump then I'll know for sure.

WIF-150

Truck went in to get the new fuel pump put in. Mechanic called and said a lot of the wiring to fuel system was rotted and corroded so he thinks this may be the problem. Also my FPDM is about 1 1/2 yrs old, anyone have a new one of these go bad? Also would the truck still run if FPDM was bad?

WIF-150

Ended up figuring it out, #1 and #6 cylinder injectors were leaking

Tommy J

How did you or they figure it was the injectors? I've had starting issues for a long time now. Maybe not exactly like yours but similar. Usually starts fine in the morning but almost always has a weak, strange crank after that throughout the day. Sometimes an extended crank. I have basically all new parts like battery, starter, fuel pump, fpcm , filters and so on. I've suspected injectors which are remans and not that old. I"ve pulled my fuel rail several times to look for drips, leaking but never seem to really see anything obvious. I'm not sure what normal is and its hard to see some of the injectors well when the fuel rail is pulled. I have the torque pro and pressure looks good but maybe its deceiving as to any fuel issues. It drives me nuts, but other wise the truck runs good. Thanks

WIF-150

Tommy, yours sound exactley like mine. I got a reader and confirmed I was loosing fuel pressure after shut off. I went around and around a little and couple of guys including ford dealer thought it was fuel pump, luckily the shop I was gonna have do it didnt think it was pump. So what they did and what I should have just done in the first place was just remove the fuel rail with the injectors and pressurize it and see which injectors leak. There is a youtube video on how to remove fuel rail. Not terrible but like everything else on these damn motors its hard to get at some stuff.

Tommy J

I've actually lifted the fuel rail several times enough so that the injectors are out of their ports to see if any are leaking but it sounds like you are saying they either completely removed it really high up or something to really get a good look. I removed it from the truck when I replaced the injectors a year ago because of those stupid clips that the injectors attach to on the rail. Its kind of a pain but not that bad. I would imagine they left them in the truck in order for it to still be attached to the fuel source and electrical connections of the injectors. what did you use to determine you were loosing pressure? these trucks don't have a Schrader valve. I have the pro torque app and plug in but can't seem to figure out fuel pressure after truck id off. Sorry for pelting you with all of these questions but I appreciate you getting back to me on my previous questions. I"ll give it another look when its not 95 out. Thanks

WIF-150

No worries? I'll ask the shop what they did, he made it sound like they lifted the whole rail with all the injectors and pressurized it and could easily see the two leaking. I used torque pro, add a gauge and scroll down to add fuel rail pressure. Then run the truck, turn truck off then turn key back to on but don't start truck. Your fuel pump will cycle and pressurize the system. Then just let it sit lime that for awhile. Mine would drop down to like 10psi in about 15 minutes.