Low Fuel Light / White Smoke

[Foxtrot6]

about a week ago i took my truck about an hour out and on the way back as i was coming to a stop in the road she idled down and stalled (the low fuel light had just come on so i should have had about 100 miles to go) i dumped 5 gallons in the tank cranked it it started but rough then it died not to start again, had it towed home fuel filter looked clean i put a lift pump on bleed it and it seemed to run ok, today went to work, about an hour away, ran fine coming home just about made it the low fuel light came on, a couple miles later started running rough, good amount of white smoke came out the tail pipe, ( reminded me of cold stacking through Utah ) got to the bottom of the ramp and it died. My first though was it sucked up a bunch of junk in the tank, but i should have fuel still, Ill be taking the tank down this weekend to look inside, Any thoughts ? truck has 500,000 +miles owned it for all but 7 of them.

 

[ChrisWilliams]

Can you post some info on your truck, year, mods... Sounds like it's getting air but need some more info. I'd bleed it again and check the pressure after the filter.

 

[mweiman]

Are you tracking mileage or any idea how much fuel is in the tank? Just curious if your gauge is reading correctly.

 

[Foxtrot6]

I tried to do a profile on my truck but it said NA 91.5 est 550,000 miles (the speedometer and odometer dont register, i think that may be my ecm everything else seems to check ok) 60mm compressor on the turbo, banks 4" exaust and muffler and gear vendor over drive w/ Getrag 5 speed. As far as fuel i havent been able to check mileage for some time but ive always had 100 miles left when the low fuel light came on. Im going to look in the tank tomorrow or sat. Had it out about 3 years ago to replace the canister inside, it had fell apart from rust and was floating around , I think I got the last canister in the country. I want to add a fuel pressure gauge in the very near future'

 

[DVolk]

My guess you need to look at the fuel line O rings ,what I did is on the engine side is cut off the factory connector get your self a nipple for the lift pump put a fuel grade hose over the plastic line and double clamp it single clamp on the plastic line the return you can use for a nipple just fine the again double clamp the plastic again my guess is you are sucking air

 

[Foxtrot6]

the fuel in the filter was clean so i left it at that, bleed the injectors and started it up. I took the high pressure line off to try to check the o ring, and at the filter end i dont know what you call that bolt but it had a washer on it between the banjo and the bolt head, but there was no washer between the banjo and the filter mount. That seems odd, it this correct ? Also it had a bleeder screw I will call it, but the banjo bolt past the filter was plain. It seems to me this would be backwards, wouldnt you want to bleed after the filter ?

 

[ChrisWilliams]

The banjo bolt should have two washers. You likely have one stuck to the filter housing or it dropped. Since that's the pressure line, it would be leaking otherwise. Are you saying the head of the banjo bolt is tapped with a 1/8 npt plug in it? If so, that would be where a fuel pressure gauge could be plumbed in. If it's sucking air, the leak will be between the lift pump and the tank.

 

[Foxtrot6]

I looked pretty good for the other washer, I look again. Not sure what size the bleed screw is yet awful small but shouldn't it be after the filter ?

 

[Foxtrot6]

Are you saying the head of the banjo bolt is tapped with a 1/8 npt plug in it? If so, that would be where a fuel pressure gauge could be plumbed in.

No its too small its not even 1/16 NPT JUST UNDER A 1/4 " D Just a bleed screw I think and its before the filter.

 

[ChrisWilliams]

Genos sells the tapped banjo bolts with larger holes for better fuel flow and they are threaded to 1/8 NPT for an adapter for a fuel pressure gauge. I use one with a 1/8 NPT to 4AN adapter for the fuel pressure gauge on my 01.5 after the filter. I'm not sure what you have there, but it needs another washer.