40
Sl no Symptom Probable Cause Remedy
2 Idling Not Smooth
Incorrect fuel or oil used Change fuel or oil
Idling speed setting not ok Adjust idling stopper bolt
Air trapped in fuel system
If trouble persists Check for
Loose Piping & Connectors
Restriction for fuel flow due to
blockage in fuel pipes
Possibility of air being sucked
in from the feed pump
Water trapped in fuel system Drain water from fuel tank, fuel filter
Fuel Pipes, feed pump gauze
filter, fuel filter, air cleaner
clogged
Clean/Replace
Incorrect fuel injection timing Reset
Incorrect Valve Clearance Reset
Injection Nozzles not clean Clean
Injection pressure not ok Rectify
Injection Spray Pattern Poor Repair / Replace Nozzle
(Worn out piston and
sleeve/valve seat leakage/
cylinder head gasket leakage)
Repair / Replace worn out parts
Incorrect Engine control
adjustment
Reset
3 Loss of Power Output
Air trapped in fuel system
If trouble persists Check for
Loose Piping & Connectors
Restriction for fuel flow due to
blockage in fuel pipes
Possibility of air being sucked
in from the feed pump
Water trapped in fuel system Drain water from fuel tank, fuel filter
Fuel Pipes, feed pump gauze
filter, fuel filter, air cleaner
clogged
Clean/Replace
Incorrect fuel injection timing Reset