Engine/Transmission (1998.5 - 2002) No Start- fuel troubles

[98slushbox]

A local guy has a 98 24v with a drag comp and FASS on it. Yesterday he got on it pretty hard and when he let off the truck died. It now only cranks over but will not start. Broke the inj. lines and only got minimal fuel out. Broke the line loose at the vp and looked to be pretty good amount of fuel. Still no starting so we broke the fuel filter loose on the fass, and was air locked. Still no start so we broke the filter loose again and more air. It kept doing the same thing, so we pulled the sending unit out of the tank to look for a hole in the pickup line and nothing. Put it back together and the same thing. Any ideas or anyone had this problem? thanks,

Lance

 

[klaybus]

I would go back to the inj lines. Crack them & crank away. I've read many posts with simular results from hard on the pedal & off & truck dying... . I may be wrong but I've read it alot.



Clay

 

[98slushbox]

It just seems funny that the fass is sucking all that air and when you loosen it there is alot of air that comes out before fuel does. We've cranked on it quite a bit but maybe we'll give it another try and crack all the lines loose. We usually only cracked 1,3,4,5. thanks,

Lance

 

[JFaughn]

I've read this symptom a few times also , I would wander if there is a problem with the fuel lines & hoses sucking air , if the system is working & the tank is full [ next idea ] is if the tank is not full enough to keep the fuel from sloshing around enough to uncover the pickup letting air in ,

 

[98slushbox]

Well, we were thinking the same thing. The tank was above 3/4 full. We pulled the sending unit and found no cracks or holes in the lines. Any ideas are appreciated.

 

[klaybus]

Lots of fuel at the VP inlet but little to none at the inj lines? That tells me it's picking up the fuel & bringing it to the inj pump but the inj pump might not be working ... Have you checked for codes? 0216 VP failure. Keep us posted. Good luck.



Clay

 

[Mhannink]

i would crack the injector lines and then prime the system w/ the fuel pump then cranck it. cycle the pump a few times first though to get all the air out of there

 

[98slushbox]

It threw no codes. It seems like theres enough fuel at the vp, but we dont have a gauge to check it. We arent getting any air at the vp, seems like it air locks at the fass. Its kinda odd, i've never seen this problem before. Acts like a line cracked in the sending unit, but we didnt see one. maybe its small enough though that we cant see.

 

[JFaughn]

Make a fitting with an old fuel filler cap or what ever , so that you can pressurize the fuel tank [ 3-5 lbs ] then with a flashlite look at the lines & hoses for leaks , it hard to see a leek on the vacume side .

 

[98slushbox]

I was thinking that if we had a leak between the fass and the tank that fuel would leak out also so i figured it would have to be in the tank. Is that not true, will fuel not leak out but air will get in? We tried unhooking just the feed line of the tank and putting it into a can of fuel but fuel would come out of the hole the line was hooked to. I will give that a try and see what happens. Thanks

 

[JFaughn]

Whats happening is a vacume between tank & pump , so if there is a leak it sucks / not blows , interpretion it sucks in air / not blows out fuel .
So when you put pressure in tank [ remember 3-5 lbs { do not want to blow something apart }] it then have pressure / not vacume & will now blow out fuel of the leaks , if there are any .