1998 JAGUAR X308 fuel pressure

Fuel Tank and Lines - Fuel Tank and Li
nes
Description an
d Operation

Fuel Tank

Parts List
The steel fuel tank is located inside the trunk and mounted across the vehicle behind the passenger compartment bulkhead.
The fuel tank is held in posi tion by two retaining straps fi tted to body-mounted brackets.
The fuel tank has an integral non-adjustable fill er pipe and integral breather and vapor pipework.
A single fuel pump is mounted inside the tank on vehicles with normally aspirated engines. For vehicles with supercharged
engines, two pumps are fitted in the tank. Fuel is drawn by the pump(s) from the fuel tank and supplied via the fuel lines
and 70 micron filter to the fuel rails.
The fuel lines run from front-to-rear down the vehicle's left-hand-side.
Ite
m
Part
Number
Descr
iption
1—Fu

el filler latch box
2—Pressure reli

ef pipe, ORVR
(shown) / tank breather pipe on non-ORVR systems
3—Tank grounding
cable
4—Evaporative flan
ge assembly
(ORVR type shown)
5—Trunk elec
trical harne
ss (part of)
6—Fue
l
level sensor
flange/connector
7—Fu
el tank retaining straps
8—F
u
el tank retaining stra
ps adjustable clamps
9—Fu
el tank retaining straps lower brackets
10—Tank vapor outlet pipe to un
derflo
or pipe quick-fit connector
11—F
u
el filler latch bo
x water drain pipe

Filler Cap and P
ipe
The fuel
filler cap with bayonet-type fixi
ng is located beneath a remote-release sp ring-latched lid on the rear saddle panel
on the left-hand-side of the vehicle.
Fuel Pum
p
The fu
el pump(s) is energized by an ECM co
ntrolled relay. Fuel is drawn by this pu mp and supplied to the fuel injectors via
the fuel line, filter and fuel rails.
Servicing of the fuel pump re quires fuel tank removal.
Ev
aporative Loss Flange Assembly
The evaporative-loss flan
ge asse
mbly is mounted centrally on top of the tank. The flange assembly consists of a removeable
steel cap which mounts the evaporative emissions system vapor outlet valves and, if applicable, a pressure sensor. The
external electrical supply to th e fuel pump(s) is also made via a connector on the flange.
The flange assembly is fixed to the tank by a locking ring which is turned usin g special tool JD-174. A seal is fitted between
the flange assembly and the tank. Three di fferent flange assemblies are applicable according to the evaporative emission
system fitted to the vehicle. The fl ange size and fixing are identical fo r the three systems, as described.
Removal of the evaporative flange assembly is necessary to gain access to th e fuel pump(s) and other internal components.
To remove the evaporative fl ange assembly the fuel tank must first be removed.
The evaporative flange variant assemblies are described, together with service information, in Section 303-13.
Fuel R
eturn
Excess fuel
is directed back to
the fuel tank via a return line.
Fuel Pum
p Relay
The
fuel pump relay,
under control of the ECM, switches power to the fuel pump motor.
I
nertia Fuel Shutoff (IFS) Switch
The IF
S switch is located in the right-hand
side footwell behind the footboard carpet . When activated the switch isolates the
ignition system and fuel pump, releases any locked doors and disables unnecessary electrical systems. The system can be
reset by pressing down the flexible cover on the top of the switch.
• NOTE: The doors will not unlock if the IFS switch is tripped when the ignition switch is in position '0'.

10
.
Disconnect the fuel feed and return pipes from the fuel tank
F
it special tool JD-203 around
the pipe as shown. Press
the tool in between the fuel pipe and tank connector to
release the quick-fit tangs. While holding the tool firmly in,
pull out the fuel pipe.
Repeat
for the second pipe.
Plu

g the tank outlet connectors and the fuel pipes.

11
.
From the underside of the vehicl e, release the fuel filler latch
box drain pipe from the clip on the spare wheel well.

12
.
Disconnect and reposition the tr unk harness if it is routed
between the filler tube and the ta nk breather or pressure relief
pipe.
1. Disconnect the lefthand re ar lamp harness connector.
2. Disconnect the fuel flap lock actuator connector.
3. If fitted, disconnect the lefthand side marker lamp
connector and harness fro m the underside of the
vehicle. Withdraw the marker lamp harness and
grommet through the trunk floor access hole.
4. Release the harness securi ng clip from the mounting
bracket.
Wi
thdraw the trunk harness from between the filler tube
and the breather pipe or pressure relief pipe.
13. Disconnect the tank harness connections.

1.
If fitted, disconnect the
wiring to the accelerometer.
2. Disconnect the wiring to the fuel level sensor harness.

3.
Disc
onnect the wiring to
the fuel pump connector.
4. If fitted, disconnect the wi ring to the pressure sensor
connector.

14 . R
emove fuel filler
latch box drain pipe.
1. Cut and remove the ratche t strap securing the drain
pipe to the filler tube.
2. Disconnect the drain pipe from the fuel filler latch box.
3. Pull the drain pipe th rough the body grommet and
remove.

15 . Di
sconnect the vapo
ur outlet pipe.
Relea
se the quick-fit coupling .
Plu
g
the vapour pipes.

16 . D
isconnect the fuel filler la
tch box from the filler tube.
Open t
he fuel filler flap
and remove the filler cap.
1. Remove the spring ring se curing the fuel filler latch
box to the filler neck.
2. Pull the fuel filler latch box free of the filler tube.
17. Detach the tank retaining straps.
Tape or tie the two reta i
ning straps/brackets to the rear
scuttle to allow tank removal.

pipe.
3
. Tie the drain pipe to th
e filler tube using a ratchet
strap. Trim strap.

10
.
Reconnect the trunk harness connections.
1. If fitted, connect the wi ring to the accelerometer.
2. Connect the wiring to the fuel level sensor harness.
3. Connect the wiring to th e fuel pump connector.
4. If fitted, connect the wiring to the pressure sensor connector.

11
.
Reconnect the lefthand side trunk harness if it has been
necessary to move it for access. Route the harness behind both
the filler tube and breather or pressure relief pipe.
1. Fit the harness securing cl ip to the mounting bracket.
2. Connect the fuel flap lock actuator connector.
3. Connect the lefthand rear lamp harness connector.
4. If applicable, feed the side marker lamp harness through the access hole in the floor and reseat the
sealing grommet.
On
the underside of the vehicl
e, fit the side marker lamp
connector and fix the harness to the securing clips.

12
.
On the underside of the vehicle, fit the drain pipe to the
securing clip.
13. On the underside of the vehicle, reconnect the fuel feed and
return pipes.
R
emove the plugs from the tank
and fuel feed and return

Instrument Cluster - Instrument Cluster
Description and Operation
ItemDescription
1Variable Power Steering
2Coolant Level
3Fuel Level
4Oil Pressure
5Lamp Dimmer
6Driver's Switchpack
7Generator (Charge Warning Lamp)
8Catalyst Overheat
9Instrument Cluster
10Climate Control (Signal to Module)
11ICE Head Unit