24 Valve Fuel Filter Change
1998-1999 ISB Ram Notes from the mail lists
Most of the hints came from Fitch's humorous mail list posting of his "first
time", and the responses that it generated.
Step 1: Drain the filter using the valve.
- Prop a 1 quart oil bottle on top of the front differential to catch fuel
from the drain tube.
- Open the drain and immediately loosen the housing nut enough to loosen the
housing. The fuel will siphon if you don't "break the seal". After that just
let it hang there for a minute until the housing empties.
Step 2: Disconnect the water sensor connector.
- Using a long screwdriver, gently/slightly raise the end of the retaining
clip and slide it off.
Step 3: Loosen canister retaining nut on header while holding canister
- The filter may stick to the top bracket and dribble fuel all over everything
if it is not popped free from the bracket before removing the canister.
Step 4: Twist and remove old filter cartridge from canister
Step 5: Clean the canister and wipe the gasket surface on the bracket.
Step 6: Lubricate gasket and O-ring and then install on new filter cartridge.
Step 7: "Replace center O-ring with new one provided.
Step 8: Install new filter cartridge in canister.
Step 9: Pre-Fill the canister with fuel.
- Some skip this and fill later by removing both plugs from the top and filling
through one of the open ports.
Step 10: Install canister on header with drain aligned as shown, and
tighten retaining nut to 10 ft-lbs.
Step 11: Reconnect water sensor electrical connector.
Step 12: Prime fuel system.
- Loosen the test port fitting towards the front of the engine (closest to
the center) on the top of the housing. This is the "outlet" test port.
- "Bump" the starter without letting the engine start. The electrical fuel
pump will run for about 20 seconds. Give the pump a few cycles before proceeding.
Watch for fuel at the loose plug-tighten.
- Some pull the injection pump relay to run the fuel pump without starting
the engine, but the FSM warns that a fault code may result and require the
DRB to re-set it.
Step 13: Start engine and check for leaks. Correct as needed with engine
- The engine may not start, or it may start but die. Try the bump start several
times again to run the lift pump. Then try cranking for 10 seconds at a time,
allowing the lift pump to complete the run cycle after each start attempt.
This may take several more attempts, especially if the lift pump is weak or
the fuel lines siphoned dry when the canister was drained.
- As a last resort, bleeding the fuel lines may be necessary. Begin at the
filter and continue along the fuel line to the injector pump until all air
is purged. Torque the banjo bolt to 18 ft-lbs.
Last Update: February 14, 2002