1995 LAND ROVER DISCOVERY fuel pressure

MANIFOLD AND EXHAUST SYSTEM
5
REPAIR INLET MANIFOLD GASKET - Mpi
Service repair no - 30.15.08
Remove
1.Disconnect battery negative lead.
2.Position absorbent cloth around fuel pipe to fuel
rail union. Unscrew union to relieve fuel
pressure. Re-tighten union.
CAUTION: Plug connections.
3.Release clip and remove air cleaner to throttle
housing hose.
4.Disconnect stepper motor multiplug.
5.Disconnect throttle potentiometer multiplug.
6.Release throttle cable from abutment bracket.
7.Release throttle cable from cam. Remove
coolant bypass hose.
8.Disconnect fuel temperature sensor multiplug.
9.Release clip and disconnect brake servo hose
from manifold.

30MANIFOLD AND EXHAUST SYSTEM
6
REPAIR 10.Release clip and disconnect breather hose from
manifold.
11.Release 2 bolts securing cam cover brackets to
manifold.
12.Remove 3 bolts securing engine harness to
manifold.
13.Disconnect 3 vacuum hoses from manifold.
14.Release clip and disconnect fuel hose from
pressure regulator.
CAUTION: Plug the connections.
15.Disconnect intake air temperature sensor
multiplug.
16.Disconnect fuel injector harness multiplug.
17.Remove 2 nuts and 7 bolts securing manifold to
cylinder head
18.Remove manifold assembly and collect gaskets.

MANIFOLD AND EXHAUST SYSTEM
7
REPAIR Refit
19.Ensure mating faces of inlet manifold and
cylinder head are clean.
20.Fit a new gasket, position inlet manifold to
cylinder head.
21.Fit nuts and bolts, tighten in the order shown to
the correct torque
25Nm
22.Position engine breather hose to manifold and
secure with bolts.
23.Connect fuel injector harness and intake air
temperature sensor multiplug.
24.Connect fuel hose to pressure regulator and
secure with clip.
25.Fit fuel pipe to fuel rail, tighten union to
10Nm
26.Connect vacuum hoses to manifold.
27.Position engine harness and cam cover brackets
to manifold, secure with bolts.
28.Connect breather hose and brake servo hose to
manifold, secure with clips.
29.Connect multiplug to fuel temperature sensor.
30.Connect breather hose to throttle housing and
secure with clip.
31.Connect throttle cable to cam and secure to
abutment bracket.
32.Connect coolant bypass hose to throttle housing.
33.Connect stepper motor and throttle
potentiometer multiplugs.
34.Connect air cleaner hose to throttle housing and
secure with clip.
35.Connect battery negative lead.
36.Adjust throttle cable.EXHAUST MANIFOLD GASKET - Mpi
Service repair no - 30.15.12
Remove
1.Raise vehicle.
2.Loosen 2 nuts securing downpipe to silencer
box.
3.Remove 4 nuts securing downpipe to exhaust
manifold.
4.Release downpipe from exhaust manifold.
5.Discard gasket.

MANIFOLD AND EXHAUST SYSTEM
9
REPAIR MANIFOLD CHAMBER GASKET - Mpi
Service repair no - 30.15.37
Remove
1.Disconnect battery negative lead.
2.Position absorbent cloth around fuel pipe to fuel
rail union. Loosen union to relieve pressure.
Re-tighten union.
3.Release clip and remove air cleaner to throttle
housing hose.
4.Disconnect stepper motor and throttle
potentiometer multiplugs.
5.Release clip and disconnect breather hose from
throttle housing.
6.Release throttle cable from abutment bracket.
7.Release throttle cable from cam. Remove
coolant bypass hose from throttle housing.
8.Disconnect fuel temperature sensor multiplug.
9.Release clip and disconnect brake servo hose
from manifold.

BRAKES
9
DESCRIPTION AND OPERATION Petrol engine vacuum system
The vacuum necessary to operate the brake servo on
petrol engine vehicles is provided by the engine inlet
manifold. During normal operation of the brakes only a
small volume of air is drawn from the servo and into
the inlet manifold or plenum chamber. However any
excessive air leaks due to damage in the brake servo
system or manifold hose connection, will effect the
mixture strength and ECM fuelling calculations on
engines equipped with an MFI system.
Diesel engine vacuum system
As the diesel engine inlet system does not produce
depression sufficient to operate the brake servo, it is
necessary to install an engine driven vacuum pump.
During normal operation of the brakes only a small
volume of air is drawn from the servo by the vacuum
pump. However as the pump exhausts air into the
engine crankcase atmosphere, an air leak due to
damage in the brake servo system or pump hose
connection, may cause excessive crankcase
pressure.