AirDog 4G Lift Pump, 100 GPH | 1998.5 to 2004 Dodge 5.9 Cummins, With Factory In Tank Pump | FP-100-4G
Part#:
Description
The AirDog 4G FP-100-4G is a 100 GPH lift pump with a water separator, fuel filter and air separation for the 1998.5 to 2004 Dodge 5.9 Cummins. The VP44 is cooled and lubricated by the fuel running through it, so a weak factory lift pump is the number one reason these pumps fail. Steady supply pressure is what keeps a VP44 alive. This kit is for trucks that have the factory lift pump in the tank.
- Fits: 1998.5 to 2004 Dodge Ram 2500 and 3500 with the 5.9L Cummins (24 valve VP44 trucks and early common rail CP3 trucks)
- Part number: A4SPBD153 (FP-100-4G)
- Flow: 100 GPH, for stock and lightly modified trucks up to about 500 hp
- Filtration: water separator plus a 2 micron fuel filter
- Pressure: built in diaphragm regulator, preset at the factory and adjustable
- Emissions: CARB EO D-595-5
- Made in: Shelbyville, Indiana
What It Does
Fuel comes in under vacuum through the water separator, which also catches large particles before they reach the gerotor pump. From there it is pushed through the fuel filter, where the rest of the contaminants are caught and the entrained air and vapor are separated out. Clean fuel goes to the engine, and the air, vapor and extra fuel go back to the tank through the built in regulator.
A factory lift pump does none of that. Air in the fuel disrupts the injector spray pattern and timing, and water is the fastest way to kill a high pressure pump.
How It Installs on Your Truck
The pump mounts to the frame rail with the supplied sandwich plate bracket, so there is no drilling the frame. Fuel is pulled through a 1/2 inch draw straw installed in the tank. The pressure side feeds the VP44 or CP3 directly, bypassing the factory filter housing and the factory lift pump. The air and vapor return goes back to the tank through a tee at the filler neck. The kit includes the pump and filter assembly, mounting hardware, wiring harness with relay, fuel lines, fittings and the install manual. No tuning is needed.
Which Flow Rate Do You Need?
AirDog's own sizing: 100 GPH units for up to 500 hp, 150 and 165 GPH units for up to 1,000 hp, and the 200 and 220 GPH units past that. A bigger pump will not hurt a stock truck, since the fuel the engine does not use is recirculated.
Other flow rates for this truck: AirDog II 5G DF-100-5G (100 GPH, in tank pump trucks), AirDog 4G FP-150-4G (150 GPH), AirDog II 5G DF-165-5G (165 GPH), AirDog II 5G DF-220-5G (220 GPH).
Filters and Maintenance
The fuel filter and water separator are standard spin on cans. AirDog's replacements are the FF100-2 fuel filter (2 micron) or FF100-10 (10 micron, better for cold weather) and the WS100 water separator. You can add spare filters right above the Add to Cart button. Cross references for the standard height cans:
- Wix: 33420 fuel filter, 33616 water separator
- NAPA: 3420 fuel filter, 3616 water separator
- Baldwin: BF7531 fuel filter, BF1275 water separator
- Fleetguard: FF5613 fuel filter, FS19594 water separator
Not sure which AirDog fits your truck or your power level? Send us your VIN and mods, or call 865 640 2097 and talk to a tech who works on these trucks every day. Comparing brands? Read our FASS vs AirDog lift pump guide.
