Simple Engine Troubleshooting; Engine Does Not Start - Isuzu 4BG1 Instruction Manual

9. SIMPLE ENGINE TROUBLESHOOTING
This item contents a simple troubleshooting. When a failure takes place on your ISUZU engine, diagnose the
cause referring this troubleshooting. Should the cause of failure cannot be detected or you are unable to
manage the failure consult to your machine supply source or nearest ISUZU engine service outlet.
Starter does not turn.
Imperfect cable connections.
Starter or starter switch failure.
Safety relay failure.
7 Engine stop system does not
Engine does not start.
Starter turns but engine
does not ignite.
r Battery discharged.
return to the original position.
No fuel in the fuel tank.
- No fuel injection.
- Clogged fuel filter element.
t
Air in the fuel system.
Control rack is stuck at no fuel
position.
Wrong engine oil viscoosity.
Unproper preheating operation.
_ Fuel is injected but
engine does not ignite.
- Glow plug malfunction.
- Incorrect injection timing.
I Low cylinder compression
pressure.
L
- Feed pump is restricted.
Engine ignite but
stall immediately.
Air in the fuel system.
- Improper low idling speed
adjustment.
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