Emission
Control
Systems-except
California
Fuel
To prevent air pollution by vapours from the fuel
tank
and
the carburetter vents,
evaporative
the control equipment stores the vapour in both of the charcoal-filled canisters
loss
control
while the engine is stopped
and
disposes of it via the engine crankcase emission
control system when the engine .is running.
The fuel
tank
venting is designed to ensure that no liquid fuel is carried to the
storage canisters with the vapours and that vapours are vented through the
control system.
The capacity of the fuel tank is limited by a specially positioned filler vent tube
and ensures sufficient volume is available after filling to accommodate fuel which
would otherwise be displaced as a result of a high temperature rise.
Warning: When filling with fuel do not attempt to add more
than
the capacity
given in
'GENERAL
DATA'. Slow filling, or allowing the level to drop and then
adding more fuel, is not recommended and can result in spillage due to expansion.
MALFUNCTION
IDENTIFICATION
Check the following items regularly for visual signs of a malfunction and also
if any of the driving symptoms listed should persistently occur.
If
you are unable
to locate and/or correct the malfunction you are advised to contact your authorized
Austin MG Dealer immediately.
Visual
checks
1. Condition and adjustment of drive belts.
2. Baked or overheated hose between air pump, diverter valve and check valve.
3. All hoses for security, damage and deterioration.
4. Fuel leakage.
5. Oil filler cap for sealing.
6. Fuel filler cap for sealing.
THE
LAYOUT OF
THE
FUEL EVAPORATIVE
LOSS
CONTROL
SYSTEM
7ND138C
Driving
symptoms
1. Violent backfire in exhaust system.
2. Hesitation to accelerate on re-opening the throttle after sudden throttle
closure.
3. Engine surges (erratic operation at varying throttle openings).
4. Engine idles erratically or stalls.
5. Noisy air pump.
6. Ignition warning light on above idle speed (slack or broken fan belt).
7. Smell of fuel vapours.
8. Engine stops after short runnin g period (fuel tarvation).
9. Lack of power.
10. Excessive fuel consumption.
11. Engine misfires (engine jerk on crui and acceleration).
12. High temperature indicated ( verh ating of coolant).
1. Secondary charcoal adsorption canister
2. Primary charcoal adsorption canister
3. Canister inter-connecting pipe
4. Vapour lines
5. Purge line
6. Restricted connection
7. Restrictor
8. Sealed oil filler
cap
9. Oil separator flame
trap
(arrester)
10. Fuel pipe
11. Fuel pump
12. Fuel
tank
13. Sealed fuel filler cap
14. Vapour line
15. Vapour tube
16. Capacity limiting
tank
17. Separation
tank
18. Vent pipes
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