OK did some checking WJ dont have a lift pump so now what.
Its a mechanical one, not electric, just looking in the diesel FSM now. Start here:
DIAGNOSIS AND TESTING - AIR IN FUEL
SYSTEM
Air will enter the fuel system whenever fuel supply
lines, separator filters, injection pump, high-pressure
lines or injectors are removed or disconnected. Air
trapped in the fuel system can result in hard starting,
a rough running engine, engine misfire, low
power, excessive smoke and fuel knock.
Inspect the fuel system from the fuel tank to the
injectors for loose connections (Refer to 14 - FUEL
SYSTEM - WARNING). Leaking fuel is an indicator
of loose connections or defective seals. Air can also
enter the fuel system between the fuel tank and the
fuel pump. Inspect the fuel tank and fuel lines for
damage that might allow air into the system.
With the DRBIIIt connected to the vehicle, select
Engine and the select Sensor Display. Page down to
view Fuel Pressure Set Point and Actual Fuel Pressure.
Start the engine and observe the Fuel Pressure
Set Point and the Actual Fuel Pressure. If the Actual
Fuel Pressure Oscillates above and below the Fuel
Pressure Set Point in a regular cycle, perform the
Fuel System Air Purge procedure (Refer to 14 -
FUEL SYSTEM - STANDARD PROCEDURE).
If the Actual Fuel Pressure gradually drops below
the Fuel Pressure Set Point then spikes well above
the Fuel Pressure Set Point, replace the fuel pressure
solenoid (Refer to 14 - FUEL SYSTEM/FUEL
INJECTION/FUEL PRESSURE SOLENOID -
REMOVAL), then perform the Fuel System Air Purge
procedure (Refer to 14 - FUEL SYSTEM - STANDARD
PROCEDURE).
STANDARD PROCEDURE
STANDARD PROCEDURE - BLEEDING AIR
FROM FUEL SYSTEM
WARNING: NO SPARKS, OPEN FLAMES OR SMOKING.
RISK OF POISONING FROM INHALING AND
SWALLOWING FUEL. RISK OF INJURY TO EYES
AND SKIN FROM CONTACT WITH FUEL. POUR
FUELS ONLY INTO SUITABLE AND APPROPRIATELY
MARKED CONTAINERS. WEAR PROTECTIVE
CLOTHING.
(1) Remove engine cover (Refer to 9 - ENGINE -
REMOVAL).
(2) Press locking ring at bleeder valve in direction
of arrow and pull off seal.
(3) Press inlet connection into bleeder valve until
it locks.
(4) Connect line between inlet connection and reservoir.
(5) Connect hand pump to vacuum side at reservoir.
(6) Operate hand pump until fuel flows through
line free of bubbles.
(7) Press locking ring at bleeder valve in direction
of arrow and detach inlet connection.
(8 ) Press seal into bleeder valve until it locks.
WG FUEL SYSTEM 14 - 1
(9) Install engine cover (Refer to 9 - ENGINE -
INSTALLATION).
STANDARD PROCEDURES - CLEANING FUEL
SYSTEM COMPONENTS
CAUTION: Cleanliness cannot be overemphasized
when handling or replacing diesel fuel system components.
This especially includes the fuel injectors,
high-pressure fuel lines, fuel rail, and fuel injection
pump. Very tight tolerances are used with these
parts. Dirt contamination could cause rapid part
wear and possible plugging of fuel injector nozzle
tip holes. This in turn could lead to possible engine
misfire. Always wash/clean any fuel system component
thoroughly before disassembly and then air
dry. DO NOT wire brush injector nozzles when
cleaning. Cap or cover any open part after disassembly.
Before assembly, examine each part for
dirt, grease or other contaminants and clean if necessary.
When installing new parts, lubricate them
with clean engine oil or clean diesel fuel only.
STANDARD PROCEDURES - DRAINING WATER
FROM FUEL FILTER
Refer to Fuel Filter/Water Separator removal/installation
for procedures (Refer to 14 - FUEL SYSTEM/
FUEL DELIVERY/FUEL FILTER / WATER
SEPARATOR - REMOVAL).