Fuel and Engine Management 83
the fuel pump will not operate until the oil
pressure is sufficient to extinguish the oil
pressure warning lamp. Therefore it will be
necessary to operate the starter motor for a
longer period than usual to start the engine.
(3) Faulty EFI component wiring connections:
Check that all component wiring connections are
clean and secure.
(4) Manifold absolute pressure (MAP) sensor
vacuum hose blocked or disconnected: Clear or recon-
nect the vacuum hose. (5) Fault in the ignition system: Check the
primary and secondary ignition circuits.
(6) Engine flooded: Fully depress the throttle
pedal until the engine starts. Check the coolant
temperature sensor. Check th e injector(s) for leakage.
ENGINE STARTS THEN STALLS
(1) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter.
(2) Air leakage at the inlet manifold: Check all
joints and hoses for air leaks. (3) Faulty EFI wiring connections: Check that
all component wiring connections are clean and
secure.
(4) Ignition timing incorrectly set: Check and
adjust the timing. (5) MAP sensor faulty or supply hose discon-
nected or blocked: Check the vacuum supply hose.
Check the operation of the MAP sensor.
ENGINE MISFIRES
(1) Faulty, dirty or incorrectly adjusted spark
plugs: Renew or clean and adjust the spark plugs.
(2) Condensation in the distributor cap: Dry and
examine the cap for cracks. (3) Faulty high tension leads: Check and renew
the high tension leads.
Testing the fuel system pressure using a pressure
gauge.
(4) Faulty ignition coil: Check and renew the
ignition coil.
(5) Fuel blockage: Check for blockage in the fuel
filter, lines and injector(s). (6) Low fuel pressure: Check the fuel pump and
fuel pressure regulator. (7) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter. (8) Loose fuel supply wiring connectors: Check
all connectors for tightness. (9) Faulty fuel injector: Check the connections
and test the condition of the fuel injectors.
ENGINE LACKS POWER
(1) Ignition timing incorrectly set: Check and
adjust the timing.
(2) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter.
(3) Incorrectly adjusted throttle cable: Adjust the
throttle cable.
Check the distributor cap for cracks or tracking be- tween the terminals. The air filter element should be renewed at 40 000 km
intervals. 1.8 liter engine.
174 Brakes
(3) Linings saturated with hydraulic fluid: Re-
new the linings in sets. (4) Incorrect linings installed: Check and install
the recommended linings in sets.
NOTE: In most cases brake fade is caused
by overuse of the footbrake, which in turn
causes a build up of heat at the friction
material and drums or disc. Once this
excessive build up of heat is allowed to
dissipate the brakes should again function
normally.
BRAKES OVERHEAT
(1) Incorrect shoe adjustment: Check and adjust
the shoe to drum clearance.
(2) Broken shoe return springs: Renew any
faulty springs.
(3) Faulty handbrake cables or incorrect adjust-
ment: Check and renew or adjust the cables. (4) Frozen wheel cylinder or caliper pistons:
Overhaul the cylinders or calipers. (5) Obstructed or damaged hydraulic hose or
line: Remove the obstruction or renew the hydraulic
hose or line.
(6) Obstructed master cylinder compensating
port: Clean the compensating port. (7) Blocked vent in the master cylinder reservoir
cap; Check and remove the obstruction in the vent. (8) Overuse of footbrake: Revise driving habits.
NOTE: To check for brake binding raise the
vehicle and spin each wheel in turn by hand.
If it is found that one wheel cylinder or
caliper piston is sti cking it is advisable to
overhaul all the wheel cylinders and calipers.
BRAKE FAILURE
(1) Faulty master cylinder: Remove and over-
haul the master cylinder. (2) Loss of fluid due to a leaking wheel cylinder:
Overhaul or renew the wheel cylinders and bleed the
hydraulic system.
(3) Loss of fluid due to a leaking caliper: Over-
haul or renew the caliper assemblies and bleed the
hydraulic system. (4) Loss of fluid due to a fractured pipe or faulty
union: Renew the faulty components as necessary and
bleed the hydraulic system. (5) Air in the hydraulic system: Locate the
source of the air leak, rectify the problem and bleed
the hydraulic system. (6) Water in the hydraulic fluid: Drain, flush,
refill and bleed the hydraulic system.
NOTE: To locate the source of a fluid leak,
fill the master cylinder reservoir with fluid
and check for obvious signs of external
leakage while an assistant pumps the brake
pedal.
Check the brake pipe unions for leaks.
BRAKE NOISE
(1) Brakes squeal on application: Glazed friction
material or missing or da maged disc pad anti-squeal
shims. (2) Grinding noise on application: Friction ma-
terial worn out. Check the friction material and
discs/drums. Renew the brake pads/shoes and ma-
chine or renew the brake discs/drums as necessary.
Inspect the brake discs for scoring and wear.
2. DESCRIPTION
The brakes are operated by hydraulic pressure in
two independent circuits by means of a tandem dual
circuit master cylinder coupled to a brake servo unit
mounted on the bulkhead between the brake pedal
and master cylinder.
The brake circuits are sp lit diagonally. The left
hand front and right hand rear brakes are connected
to the primary circuit, and the right hand front and
left hand rear brakes are connected to the secondary
circuit. Should a malfunction occur in one circuit, the
remaining circuit is capable of stopping the vehicle.
