Help needed

[VanillaGorilla]

So, what I now call "The Pile" is a very nice freshly painted and polished inside and out 93 Cummins, Bought it in November, drove it for 2 weeks then it started smoking blue and missing and ran like crap. Off the road and into the shop. Fixed the only visible fuel leak I could find and it did the same thing, crap! So I thought maybe it lost an injector so while I'm making it a rust free truck and doin the paint and body stuff I hunt down some BD diesel 40hp injectors on here used. Fast forward to today. After it finally caught a prime and started it still does the same thing, F*&K!!!!! Must be sucking air I guess, but where? All my fittings are tight, lift pump is brand new and should be strong, I can't see that wierd fuel line being cracked and I have no fuel puddles under it. So at this point I'm pissed especially when by doing nothing but letting it sit while I work on it the truck has developed an electrical draw that will drain the battery in 1 weeks time WTF!!! I decide I need to get away from it and I head home, 4 hours later I return and go to move it and wouldn't ya know it, for the first time ever it's lost its prime and will not start.

What is going on with this thing and where can I start??? I'm pulling my hair out and am about to freak out and lose it. This is not some high mile worn out old thing, it's got 129,790mi on it, that's 200 more than when I got it, I've owned it 4 months now and have driven it for 2 weeks, the rest of the time it's been eating my wallet and parts and I swear our 03 Duramax (which would tear this thing up with a touch of the Attitude screen) is laughing at my gorgeous piece of garage art Cummins truck, that's not right people. Help me out here please.

[Tacoclaw]

If it's losing prime then it's probably sucking air before the LP. Check the fines along the framerail back to the fuel tank.

On my truck they all looked perfect, until I dropped my tank. Everything between my tank and the frame was really rusty. The lines where they changed to rubber and went into the sending unit were extremely rusty, I wouldn't be surprised if you had a pinhole there that was causing these headaches.

[VanillaGorilla]

makes sense to me. Frustrating when you sink money into something and get sthi on ya know. Unfortunately I'm probably gona have to take it to the local diesel performance shop cause I'm on a jobsite 4 hours away from home all week, gota love good timing lol. Thanks

[CumminsPower59]

Even at a job site, if you got compressed air and a shop rag, you could find where it's suckin air. Put some air into the filler opening (use VERY low pressure) and seal the opening with a rag. It will then push fuel out of wherever it's sucking air. I use that trick quite frequently at work with good results. Hope this helps ya

[VanillaGorilla]

That I will try. Today I tried to rig up an artificial fuel line to eliminate the possibility of that being bad, not much luck there. Tested lift pump with a vacuum gauge and it seems okay. So I guess an air hose is my next bet. Thanks

[CumminsPower59]

You betcha! Don't use too much pressure or it can pop the tank..

[VanillaGorilla]

Think i got it figured out no air leek just in proper prime, i think the fss took a crap found some rubber like crums at the banjo bolt going to the IP, so my questions are, This wouldn't allow proprer pressure to injectors right there for no start up? And Whats the vw part number for the cheap fss and the cummins number

thanks for replies

[CumminsPower59]

If the pluger on the FSS isn't too terribly torn up, you could grind it down a little and it will still function.

Here's the link to another site on how to do it
http://www.dieseltruckresource.com/dev/ ... p?t=117593

Hopefully someone will chime in with the part numbers...



Or, you could join the "pull cable club" and not have to deal with torn plungers again

[PToombs]

If the FSS chipped there's no way it could get into the banjo bolt going into the IP. There may be other trash plugging the inlet, or something else coming apart in the filter .