Page 79 of 208
FUEL MIXTURE
Inlet/Exhaust manifolds
12F8Q engine
Manifold mounting studs on cylinder head 1
Manifold mounting nuts on cylinder head 2.7
Inlet manifold strut mounting bolt 2.5
Cylinder block strut mounting bolt 2.5
TIGHTENING TORQUES (in daN.m)
REMOVAL
Remove the air filter (two mounting bolts at the
top, two mounting nuts at the bottom (1)).
Remove, from above, the two nuts fixing the ex-
haust downpipe to the manifold.
Slacken, without removing it, the nut on the
clamp connecting the downpipe to the exhaust
pipe.
Tilt the exhaust downpipe towards the gearbox.
Remove the nuts securing the manifolds:
- nuts (A) from above,
- nuts (B) from below.
PRO12.1
Special note
To remove nut (C) located above the starter mo-
tor, use a small ratchet (6.35 mm square) and a
universal joint.
13047-1R1
13047R
12-14
Page 80 of 208
FUEL MIXTURE
Inlet/exhaust manifolds
12F8Q engine
REFITTING
Replace the manifold gaskets (metal part of the
gasket on the manifold side).
Replace the gaskets between the inlet manifold
and the air filter.
Replace the steel gasket between the exhaust ma-
nifold and the exhaust downpipe.
For the other operations, refitting is the reverse of
removal.
12-15
Page 85 of 208
FUEL SUPPLY
Injector gallery
13
In order to remove an injector, remove the clips at
(8), then pull on the injector .
99373R
IMPORTANT: during the opening of the fuel cir-
cuit , be sure to use a cloth to avoid possible pro-
jections of fuel due to the residual pressure.
REMOVAL
Disconnect the battery.
Remove the air filter.
Remove:
- the fuel supply pipe (1)
- the fuel return pipe (2)
- the fuel pressure regulator pipe (3) .
Remove the three bolts (4) mounting the injector
gallery (5).
Remove the injector gallery.E7J Engine
13244R
REFITTING
Replace the O rings at the base of the injector (if
the injector has been removed, also replace the
seal which is level with the injector head).
To ensure that the fuel supply unions are correct-
ly fastened, it is necessary to hear a"click" sound
whilst fastening.
For all other operations, refitting is the reverse of
removal .
13-5
Page 86 of 208

FUEL SUPPLY
Fuel filter
13
LOCATION
The fuel filter is located under the vehicle, in
front of the fuel tank. Petrol
engines
99214R
SPECIAL TOOLING REQUIRED
Mot. 1265 Pliers for removing quick release
unions
REPLACEMENT
It is recommended to replace the fuel filter at
each vehicle major service.
IMPORTANT : during the opening of the fuel cir-
cuit , be sure to use a cloth to avoid possible pro-
jections of fuel due to the residual pressure.
REMOVAL
Before removing the filter take precautions to
catch fuel that will run out of the pipes (the pipes
should not be clamped as they would be dama-
ged).
Remove the clips (1).
Disconnect the pipes fitted with quick release
unions (2) using tool Mot. 1265.
96420R3
Remove bolt (3) and remove the fuel filter.
REFITTING
Observe the flow direction of the fuel (marked by
an arrow on the filter).
Reconnect the pipes by hand (tool Mot. 1265 is
not required ).
Ensure that the quick release unions are correctly
fastened .
Refit the safety clips (1).
13-6
Page 96 of 208
DIESEL EQUIPMENT
Location of components
13
1 EGR valve and solenoid valve
2 Air temperature sensor (white connector)
3 Coolant temperature sensor (white connector)
4 Diesel injection computer
5 Fuel filter
6 Pre-postheating plug relay housing
7 TDC sensor
8 Fast idle solenoid valve
9 Electrical solenoid / coded solenoid
10 Digital DPC injection pump
11 Load potentiometer
12 Advance solenoid valve
13 Altimetric corrector
14 Injector with sensor (needle lift)
12874
13-16
Page 97 of 208
DIESEL EQUIPMENT
Location of components
13
12Advance solenoid valve
14Injector with sensor
13Altimetric corrector
11Load potentiometer
9Electrical solenoid / coded solenoid valve
8Idle speed solenoid valve
12869-1R
3Coolant temperature sensor
2Air temperature sensor
6Pre-postheating plug relay housing
5Fuel filter
16Inertia switch
4Injection computer
13083R
12872R
19 EGR solenoid valve
12871R
13-17
Page 156 of 208
INJECTION
General
17
1 Coil
2 Air filter
3 Oxygen sensor
4 Absolute pressure sensor
5 Throttle position potentiometer
6 Idle regulation stepping motor
7 Air temperature sensor
8 Injection computer
9 Inertia switch
10 Locking relay
11 Fuel pump relay
12 TDC sensor
13 Fuel vapour recycling solenoid valve
14 Coolant temperature sensor
15 Tool for removing spark plug leads
16 Pinking sensor
17 Power assisted steering pressostat
18 Pressure regulator
19 Anti-interference condenser
20 Fuel vapour absorber (canister)
LOCATION OF COMPONENTS
13081
D7F Engine
17-6
Page 157 of 208
INJECTION
General
17
1 Fuel vapour recycling solenoid valve
2 Air filter
3 Pinking sensor
4 Absolute pressure sensor
5 Idle speed regulation stepping motor
6 Throttle position potentiometer
7 Air temperature sensor
8 Injection computer
9 Inertia switch
10 Fuel pump relay
11 TDC sensor
12 Coolant temperature sensor
13 Oxygen sensor
14 Coil for cylinders 2 - 3
15 Power assisted steering pressostat
16 Coil for cylinders 1 - 4
17 Fuel vapour absorber (canister)
18 Anti-interference condenser
LOCATION OF COMPONENTS
13082
E7J Engine
17-7