The commonly occurring troubles in the fuel supply systems of
automobiles and suitable remedies have been suggested.
High fuel consumption
Air cleaners may be choked, which may be taken out and cleaned
by blowing compressed air from the inside of the element. In case the element
is too much dirty, it may be washed in a detergent, rinsed and dried.
Fuel may be leaking from somewhere in the supply system,
which may be inspected and corrected if detected.
The driver may be in the habit of pumping the accelerator
pedal unnecessarily, thus wasting fuel through the accelerating pump.
The idle adjustment may not be correct. If so, the same may
be readjusted.
Difficult starting
The carburettor
jets may be clogged, which should be removed and serviced.
The choke
may not be closing properly while pulled up. The same may be inspected and
adjusted.
There may be
some air leak into the inlet manifold, which would weaken the mixture which no
longer remains sufficiently rich to start combustion. This may be inspected and
remedied.
The fuel
filter may be clogged and so may not be the same as specified. The pump
pressure may be tested as described and if found defective, may be repaired or
replaced.
Poor idling
The float level
may not be correct, which may be checked and adjusted.
The float
valve needle may be sticking. This may be remedied by cleaning the carburettor
inlet and valve needle thoroughly.
The screws
connecting the carburettor with the induction manifold may be loose or the gasket
there may be damaged. In both of these situations, the air may leak into the
manifold and weaken the air-fuel mixture.
The jets in the carburettor may be loose, which may be inspected and if detected, tightened.
The air
cleaner may be clogged, which may be removed and overhauled.
The throttle valve
plate or spindle may be bent, which has to be replaced.
Poor acceleration
The accelerator pump may not be adjusted correctly or may not be
working at all. This may be checked when the engine is not running. Just press
the accelerator pedal and a spurt of fuel oil should be forced out of the
acceleration part in the carburetor. If found defective, the pump including its
linkage should be inspected and the defect remedied by repair or replacement as
required. Inside the pump, the diaphragm may be punctured or the pump leather
washer may have become hard or worn, or the ball check valves may be defective.
The fuel filter may be clogged, which may be cleaned or if
required, replaced.
Fuel pump may be defective which may be inspected and
repaired or replaced.
The fuel line may be clogged, which may be cleaned.
The fuel level in the float chamber may be low which may be
corrected by adjusting the float.
Overheating of the engine
Apart from faulty ignition timing or defective cooling
system, this could be also due to a weak air-fuel mixture, the reasons for
which have been described above.
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