Whit
Registered User
All 24 valve owners are aware of the weak link of the oem lift pump, The lift pump supplies fuel from the tank to the VP-44 and also circulates an excess amount thru the VP for cooling and lubricity of the pump before returning the fuel back to the tank. many many owners have tried to correct the problem , some with continued failure and some with success, many have added a pusher pump and it is my believe that this only adds twice as many pumps for failure, I know a pusher pump is being used by alot of CTD owners with success but this mod was not for me, I also know that the new FASS system has so far had great reviews by folks actually using them but the initial cost to me is expensive, but if the FASS will prevent the loss of a VP-44 then it would be worth it, I will admitt that if I were still using my oem tank as a feed source I too would have a FASS in service. Here is an alternative system I have had in place for about 2 years and so far have had great luck with, If you run an auxillary tank in the bed of your truck you should consider this system as it has proven for me.
I dont run a lift pump and I dont want one
When I say I dont have a lift pump that is exactly what I mean, I took my oem lift pump and moved it back on the frame under my in-bed fueltank where fuel with head pressure of 1 pound is being supplied to the suction side of my pump....................................my pump no longer lifts fuel at all and is now considered a delivery pump!
NO pump likes to pull a vacumn but prefers a positive head pressure, the OEM setup is the problem, the pump is on a constant vacumn from pulling up to 2 feet and from up to 8 feet away, there is not a pump on the market that will survive this kind of application or punishment.
Here is what I have done to correct my OEM fuel delivery system. I purchased an auxillary inbed fuel tank, this is my MAIN supply to my delivery pump ( no longer a lift pump ) I have installed a ball valve at the bottom of the tank for maintenance purposes and 1/2" line to the pump, 1/2" line from the discharge of the OEM pump to the OEM filter housing in its original location and 1/2" line from the filter to the VP-44 and all banjos have been removed and replaced with -6an fittings.............................RESULTS ARE I now idle at 15 psi of pressure and cruze at any speed at 15 psi!!! and at wot I can only pull it down to 12 psi!!! As far as fuel usage from my Cummins I have 275 injectors and a comp box, the above stated readings are with the comp on 5x5. Before this mod my numbers were cruze 75 mph at 12 psi, WOT at 4-5 psi.I now use my OEM fuel tank as a storage and transfer tank.
Bottom line is if you dont want a lift pump than turn it into a supply pump.
Cheers, Kevin
I dont run a lift pump and I dont want one
When I say I dont have a lift pump that is exactly what I mean, I took my oem lift pump and moved it back on the frame under my in-bed fueltank where fuel with head pressure of 1 pound is being supplied to the suction side of my pump....................................my pump no longer lifts fuel at all and is now considered a delivery pump!
NO pump likes to pull a vacumn but prefers a positive head pressure, the OEM setup is the problem, the pump is on a constant vacumn from pulling up to 2 feet and from up to 8 feet away, there is not a pump on the market that will survive this kind of application or punishment.
Here is what I have done to correct my OEM fuel delivery system. I purchased an auxillary inbed fuel tank, this is my MAIN supply to my delivery pump ( no longer a lift pump ) I have installed a ball valve at the bottom of the tank for maintenance purposes and 1/2" line to the pump, 1/2" line from the discharge of the OEM pump to the OEM filter housing in its original location and 1/2" line from the filter to the VP-44 and all banjos have been removed and replaced with -6an fittings.............................RESULTS ARE I now idle at 15 psi of pressure and cruze at any speed at 15 psi!!! and at wot I can only pull it down to 12 psi!!! As far as fuel usage from my Cummins I have 275 injectors and a comp box, the above stated readings are with the comp on 5x5. Before this mod my numbers were cruze 75 mph at 12 psi, WOT at 4-5 psi.I now use my OEM fuel tank as a storage and transfer tank.
Bottom line is if you dont want a lift pump than turn it into a supply pump.
Cheers, Kevin