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