all i can figure is that my injection pump has had enough, its happened twice now, while im driving the truck just dies. when i crack the line into the injection pump i dont get anyfuel. So i cycle my Fass pump then tighten the fitting and move on to the injectors and both times it has fired right up. maybe my FASS?
sounds like your lift pump to me. I'm not too familiar with dodge but I understand the lift pump to be a major weak point. A buddy at work had lots of lift pump problems on his 24v cummins. replaced at least twice in a year.
If you aren't getting fuel to your injection pump, sounds like your lift pump is toast... that is strange though since you have the FASS. You should have a warranty on that FASS I think. Maybe there is a blockage in the fuel line somewhere?... One other thing to look at is if you left the stock (in-tank) lift pump in there, it could be blocking the flow of fuel... when the guy installed mine he had to remove the stock pump that was down in the tank because it was blocking the flow.
i dont think i have the intank pump, my lift pump was on the side of the block, the FASS pump is basicly new thats why i dont think thats it. i know for sure there are no blockages in the line.
when you installed the fass, you bypassed the factory lift pump, correct? if not that could be where you are losing the fuel. id try changing all my fuel filters to rule out that one even though they are new, maybe something got clogged or you had a dirty tank? do you have a fuel pressure guage to know what kind of pressure you are getting tat the vp44? that is an important # to know. with my fass i uasually have about 12-13 psi. knowing the psi will give you alot of info on what it might be. hope this helps good luck
Funny you bumped this back to the top, it did it again the other day. this time i had fuel at the vp44 but not to the injectors It seems like it only does it when im low on fuel (around an 1/8) this could mean nothing but its happened twice at the same level. If it happens again im gonna pull the tank and check the pickup. My fass is run all the way to the VP44, but i dont have a fuel pressure gauge. Im planning on getting a edge juice w/ attitude soon which has the fuel pressure gauge built in if im correct? For now the dodge is not getting alot of drive time, my 90 integra is getting 100miles a day from san jose to SF:doah:
First things first. Get a pressure reading today! Make sure the FASS is working correctly. I have no doubt that it is, but you should be absolutely sure. Also, make sure there are no suction air leaks. These usually will not shoe any wetnes from fuel. They are just sucking air. This will cause a loss of prime as well. The next step, check for codes. Cycle your ignition key from the OFF position to the ON position 3 times very quickly leaving it in the ON position. The odometer will change and start showing P numbers . Write everythign down until the odometer goes back to the mileage. In other words, it will say PDONE two times before it's done. With this we can guess at what's going on as well. If you have fuel pressure and you get a certain code or two, it'll be injection pump time. If you need some help, feel free to drop me a line. I'll try to help you diagnose it and get you back on the road. Dave 503.970.6712
i have had this same problem you have had. in our year trucks i dont think there are any baffles in the tank, so when your low and hit the brakes hard, my fule pressure would drop. my buddie did this in my truck and it wouldnt start afterwards. it wouldnt start and i had all the fuel in the world at the filters. so i unforutanally had to sprty starting fluid to it and it started right up. now i try not to go below a 1/4 tank. it seems to not have that problem. when u get the edge you will see exactly what im talking about. my fuel alarm would go off when i braked hard on a low tank. if you read the thread about me hating my fass pump that is in there. hope this all helps
Like posted, you need a FP reading. You could have a VP heading south, or it may be a simple as an overflow valve sticking. When the truck dies, does it do it under a load or when you let off the throttle like to slow down?
i think its just the non baffel tank that is getting you. when u left of the gas or brake the fuel can/ will slosh to the front and give you lowe fuel pressure. if you brake to stop and shut your truck off, its possiable to get some air inthe line and then not start. it happened to me......
id say everything is fine, just keep it above 1/4 tank if u can, and when u get your fuel pressure guage you will know exactly when its not gettin enough fuel. good luck
If you run the tank below an 1/4, I have seen a few trucks that have sloshed the fuel around & get an air bubble. Truck shuts down, bleed injectors lines & truck starts. Another thing I have seen is - 3 guys that were using a fuel additive, somehow managed to get the silver foil seal from the bottle into the tank & once the gets to certain level, the foil interrupts the fuel flow & shuts the truck down. Removed the foil & truck no longer has this problem. All 3 had draw straws in the tank. If at all possible don't run below 1/4 of a tank - sending units not always correct.
The sending units in the 2nd gen trucks are RARELY correct, actually. we changed 4 out in one week about a month ago. Poor kid called all upset, thought his VP was shot, didn't have the money to fix it, was wondering if there was anything he could do to keep it alive a little longer. Didn't even have to check the Fuel Pressure. You could hear the lift pump free running. He swore it had 1/4 tank in it. Put 5 gallons in and you should have seen the look on his face when it fired up!! The sending unit is pretty cheap, its the dropping the tank and getting the tank unit apart that can be hard and messy. On another note - It only occasionally stalls, right? You don't have any sort of lope or anything else goofy when you let off the throttle? I ask because the VP cuts injection on deceleration, and if the governor on the pump doesn't catch it for idle it can die. Usually the governor will cause it to stumble or lope as it tries to catch it if it doesn't die.
The dealer actually has a kit for around $65.00 that replaces the float, arm & wiring. It only works on the original type fuel pick up / sending unit assembly. In-Tank pumps have to be replaced as a whole unit.
