Unstable Engine Running - Isuzu 4BG1 Instruction Manual

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Incorrect control lever adjustment
Crack in injection pipe.
Unstable low idling Injection nozzle failure.
Engine stop button restricted at stop position.
Uneven compression pressure between cylinders.
--c
Incorrect control lever adjustment.
Too high low idling speed.
Governor interior malfunction.
Unstable engine running
Engine hunting in medium
speed range.
- Governor spring deteriorated.
Air in the fuel system
- Insufficient fuel supply. Clogged fuel filter element
Fuel leakage from overflow valve
Malfunction in engine at
high speed range.
Uneven fuel injection amount between
plungers.
- Deteriorated governor spring.
Incorrect valve clearance
adjustment.
Deteriorated valve spring.
L
Engine speed does not be
Engine control restriction or
lowered.
seizure.
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