Filters
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Call or Text (352) 722-5295Fuel filtration on the 1994-1998 Dodge Ram 5.9L Cummins
From the factory, fuel leaves the mechanical lift pump and passes through a Dodge-only nylon pre-strainer in the fuel heater housing, then a spin-on Fleetguard filter, before it reaches the Bosch P7100. The filter number changes at 1997: FS19519 fits 1994-1996 and FS19598 fits 1997-1998. The service interval is 12,000 miles or 12 months in normal use, and 6,000 miles in severe service. Clean the pre-strainer at every filter change. Unscrew the bowl and check the quad-ring seal while you're in there.
What goes wrong
The pre-strainer collects debris until it starves the lift pump, and you'll notice low power and smoke. A cut or distorted quad ring leaves a fuel weep at the heater bowl; Dodge sold a strainer-and-quad-ring kit for exactly that. Pair a restricted strainer with a mechanical lift pump that has lost output with age, and a 12-valve Cummins moves from hard cold starts to a dropping idle and eventually a no-start.
Factory filter vs. a frame-mounted system
If your truck is stock and you keep up with filters and the pre-strainer, the factory setup does the job. If the engine has been built, or you want water separation and finer filtration, a frame-mounted electric system replaces the mechanical lift pump, adds 2-micron filtration and holds 35-55 psi of supply. FASS systems put a water separator and a particulate filter on the frame rail ahead of the engine. AirDog's 100 gph system runs around 35 psi. Once the electric pump is in, a block-off plate seals the old mechanical pump opening.
What we carry
FASS Titanium Signature Series systems for 1994-1998 trucks in standard, PLUS and No-Drop versions, the XWS3002 Extreme Water Separator, extended-length XWS3002XL water separator and PF3001XL particulate filters, and FASS filter packs in standard and XL. AirDog FP-100-4G and FP-150-4G air/fuel separation systems, II-5G DF-100-5G, DF-165-5G and DF-220-5G systems, Raptor 4G pumps in 100 and 150 gph, universal 150 gph Raptor pumps, replacement fuel filters in 2-micron and 10-micron, WS100 replacement water separators and a low-pressure indicator light. A BD Diesel replacement P7100 injection pump for 1996-1998 trucks is also listed here. More systems are on our lift pumps page.
Fitment notes
Match the spin-on filter to the 1997 split. Frame-mounted systems draw from the tank through a draw-straw or an added tank sump, and the factory tank has a barrel strainer on the sending unit that can bind, so replace it while the tank is down. The AirDog Raptor pumps marked universal are not truck-specific listings, so read the product page to see what's included. A 1998 might be a 24-valve: if it has a VP44 rotary pump with a wiring harness instead of the P7100 with a shutoff solenoid on top, these 1994-1998 listings aren't for it. Verify by VIN.
Frequently asked questions
Which spin-on fuel filter does my 12-valve take?
FS19519 for 1994-1996 trucks and FS19598 for 1997-1998. Change it every 12,000 miles or 12 months, or every 6,000 miles in severe service.
What is the pre-strainer, and do I need to service it?
It's a Dodge-only nylon strainer inside the fuel heater housing, ahead of the lift pump. It clogs and starves the pump, so clean it at every filter change and replace the quad ring if it's cut or distorted.
Does a FASS or AirDog replace my mechanical lift pump?
Yes. A frame-mounted electric system takes over the mechanical pump's job and adds water separation and finer filtration. Seal the old pump opening with a block-off plate when you install it.
Do I need a tank sump to install one?
Frame-mounted systems draw fuel through either a draw-straw or an added tank sump. Either way, replace the factory barrel strainer on the sending unit while the tank is down.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.