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Troubleshooting
Problem
Possible Cause
Low idle
Clogged fuel filter
Clogged pre-fuel filter
Clogged air cleaner
Engine starts but
stops shortly there-
Engine control system
after
failure
Injection pump failure
Clogged strainer
Electromagnetic type
fuel pump failure
Fuel system failure
Water or air is in fuel
Engine running is
system
unstable
Engine control system
failure
Insufficient warm-up
time
Excessive engine oil
Exhaust smoke is
Engine control system
white
failure
Injection pump failure
Fuel system failure
Excessive speed
Injection pump failure
Clogged air cleaner
Exhaust smoke is
Clogged intercooler
black
Fuel system failure
Clogged exhaust sys-
tem
No coolant
Front of radiator is
clogged with dust
Sub tank cap is not
Engine overheats
tightened
Coolant is fouled
Oil in coolant
Thermostat failure
Incorrect engine oil vis-
cosity
Insufficient engine oil
Oil pressure does
level
not rise
Engine failure
Meter, lamp, or switch
failure
32
Solution
Adjust by idling control equipment on the machine. If adjustment is not
possible, contact ISUZU dealer.
Remove water and change element.
Clean or change element.
Contact an IASD.
Purge air or remove water.
Contact an IASD.
Conduct warm-up operation.
Correct oil level.
Contact an IASD.
Verify engine RPM. Check AVR adjustment.
Contact an IASD.
Clean or change element.
Contact an IASD.
Add coolant.
Clean with soft brush.
Tighten or replace sub tank cap.
Clean inside of radiator and change coolant.
Contact an IASD.
Change thermostat.
Change with oil of correct viscosity.
Replenish.
Contact an IASD.
Owner's Manual for Flameless Air Heater
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