1999 LAND ROVER DISCOVERY engine

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-85
Knock sensor (KS)
$% 18.30.28
Remove
1.Release fixings and remove battery cover.
2.Disconnect battery earth lead.
3.Raise front of vehicle.
WARNING: Do not work on or under a
vehicle supported only by a jack. Always
support the vehicle on safety stands.
4.Remove fixings securing underbelly panel and
remove panel.
5.Disconnect multiplug from KS.
6.Remove nut securing KS to cylinder block and
remove KS. Refit
1.Clean mating faces of KS and cylinder block.
2.Fit KS to cylinder block and tighten nut to 22
Nm (16 lbf.ft).
3.Connect multiplug to KS.
4.Fit underbelly panel and secure with fixings.
5.Remove stand(s) and lower vehicle.
6.Connect battery earth lead.
7.Fit battery cover and secure the fixings.

ENGINE MANAGEMENT SYSTEM - V8
18-2-86 REPAIRS
Air cleaner assembly
$% 19.10.01
Remove
1.Remove 2 nuts securing air intake ducting.
2.Remove both parts of air intake ducting.
3.Release 2 clips securing MAF sensor, release
2 clips securing air intake hose.
Note: Pre 03 MY air intake hose illustrated.
4.Release air intake hose and position aside. 5.Remove and discard MAF sensor 'O' ring.
6.Release air cleaner assembly from 3
grommets and remove assembly.
Refit
1.Position air cleaner assembly and secure in
grommets.
2.Fit new 'O' ring to MAF sensor.
3.Position air intake hose, secure MAF sensor
clips and tighten intake hose clips.
CAUTION: Ensure MAF sensor 'O' ring is
not displaced during fitting.
4.Fit air intake ducting and secure with nuts.

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-87
Element - air filter
$% 19.10.10
Remove
1.Release 2 clips and disconnect MAF sensor
from air filter cover, remove and discard 'O'
ring.
2.Release 2 clips and remove cover from air
filter.
3.Remove air filter element. Refit
1.Clean air filter body and cover.
2.Fit new air filter element.
3.Position air cleaner cover and secure clips.
CAUTION: Ensure clips are correctly
located on cover.
4.Fit a new MAF sensor 'O' ring, position MAF
sensor and secure clips.
CAUTION: Ensure 'O' ring is not displaced
during fitting.

ENGINE MANAGEMENT SYSTEM - V8
18-2-88 REPAIRS
Cable - throttle
$% 19.20.06
Remove
1.Release 3 fasteners and remove drivers side
closing panel and move aside.
2.Release inner cable from throttle pedal.
3.Release outer cable from bulkhead. 4.Release outer cable from clip, loosen lock nuts
and remove outer cable from abutment
bracket.
5.Release inner cable from operating lever and
remove cable.
Refit
1.Position cable, secure to bulkhead and
connect inner cable to throttle pedal.
2.Position inner cable to operating lever and
connect outer cable to abutment bracket and
retaining clip.
3.Position closing panel and secure fasteners.
4.Adjust throttle cable.

+ ENGINE MANAGEMENT SYSTEM -
V8, ADJUSTMENTS, Cable - throttle.

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-89
Sensor - Mass Air Flow (MAF)
$% 19.22.25
Remove
1.Disconnect multiplug from MAF sensor.
2.Loosen clip and release air intake hose from
MAF sensor.
Note: Pre 03 MY air intake hose illustrated.
3.Release 2 clips and remove MAF sensor from
air cleaner, remove and discard 'O' ring.Refit
1.Fit new MAF sensor 'O' ring, position MAF
sensor to air cleaner and secure with clips.
CAUTION: Ensure 'O' ring is not displaced
during fitting.
2.Position air intake hose to MAF sensor and
secure with clip.
3.Connect multiplug to MAF sensor.

ENGINE MANAGEMENT SYSTEM - V8
18-2-90 REPAIRS
Throttle Body
$% 19.22.45
Remove
1.Loosen 3 clips securing air intake hose, release
air intake hose and position aside.
Note: Pre 03 MY air intake hose illustrated.
2.Disconnect throttle and cruise control cables
from throttle body.
3.Loosen clip securing breather hose and release
hose. 4.Disconnect multiplug from throttle body.
5.Position a container below the throttle body to
collect coolant spillage.
6.Loosen 2 clips securing coolant hoses to
throttle body and release hoses.
7.Remove 4 bolts securing throttle body to
plenum chamber.
8.Remove throttle body and discard gasket.
Refit
1.Clean plenum chamber and throttle body
mating faces.
2.Using a new gasket, position throttle body, fit
bolts and tighten to 9 Nm (7 lbf.ft).
3.Connect coolant hoses to throttle body and
secure clips.
4.Connect breather hose to throttle body and
secure clip.
5.Connect multiplug to throttle body.
6.Connect throttle and cruise control cables.
l

+ ENGINE MANAGEMENT SYSTEM
- V8, ADJUSTMENTS, Cable - cruise
control.
l

+ ENGINE MANAGEMENT SYSTEM
- V8, ADJUSTMENTS, Cable - throttle.
7.Position air intake hose and secure clips.
8.Top-up cooling system.
M19 2576A
1

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-91
Plenum chamber
$% 19.22.46
Remove
1.Remove upper manifold gasket.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
2.Remove 2 bolts securing throttle cable
abutment bracket and remove bracket.
3.Remove breather hose adaptor.
4.Remove 4 bolts securing plenum chamber to
upper manifold and remove plenum chamber.
5.Collect plenum chamber gaskets.
Refit
1.Clean plenum chamber and upper manifold
mating faces.
2.Using new gaskets, position plenum chamber
fit bolts and tighten to 22 Nm (16 lbf.ft).
3.Fit breather adaptor and tighten to 6 Nm (4.4
lbf.ft).
4.Position throttle cable abutment bracket, fit
bolts and tighten to 9 Nm (7 lbf.ft).
5.Fit upper manifold gasket.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
Sensor - throttle position (TP)
$% 19.22.49
Remove
1.Disconnect multiplug from TP sensor.
2.Remove 2 screws securing TP sensor to
throttle body.
3.Remove TP sensor and discard 'O' ring.
Refit
1.Clean TP sensor and throttle body mating
faces.
2.Using a new 'O' ring, position TP sensor. Fit
screws and tighten to 2.2 Nm (1.6 lbf.ft).
3.Connect multiplug to TP sensor.

ENGINE MANAGEMENT SYSTEM - V8
18-2-92 REPAIRS
Valve - idle air control (IACV)
$% 19.22.54
Remove
1.Disconnect multiplug from IACV.
2.Loosen 2 clips securing air hoses and release
hoses.
3.Remove 2 screws securing IACV to inlet
manifold.
4.Collect clamps and remove IACV.
Refit
1.Position IACV to inlet manifold, locate clamps,
fit screws and tighten to 8 Nm (6 lbf.ft).
2.Position air hoses to IACV and secure clips.
3.Connect multiplug to IACV.
Injectors
$% 19.60.12
Remove
1.Remove upper manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
2.Carefully manoeuvre ignition coil assembly
from between inlet manifold and bulkhead.
3.Position absorbent cloth beneath fuel pipe to
catch spillage.
4.Disconnect fuel feed hose from fuel rail
CAUTION: Always fit plugs to open
connections to prevent contamination.
5.Release injector harness from fuel rail and
disconnect injector multiplugs.