Fuel Is Being Delivered To The Injection Pump - Isuzu A-4JA1 Workshop Manual

TROUBLESHOOTING
3.

FUEL IS BEING DELIVERED TO THE INJECTION PUMP

Checkpoint
Continued from the previous page
OK
Injection nozzle
OK
Injection pump
OK
Injection pump (VE pump)
180
1. HARD STARTING
ENGINE TURNS OVER BUT DOES NOT START
Trouble Cause
Injection nozzle injection starting
NG
pressure too low
Improper spray condition
Defective fuel injection nozzle
NG
resulting in fuel drippage after
fuel injection
NG Defective injection pump control
rack operation
NG Injection pump plunger worn or
stuck
Injection pump drive shaft
NG
seizure or other damage
Injection pump governor spring
NG
seizure
Countermeasure
NG Adjust or replace the injection
nozzle
NG
Replace the delivery valve
NG Repair or replace the injection
pump control rack
NG Replace the injection pump
plunger assembly
Replace the injection pump drive
NG
shaft
Replace the injection pump
NG
governor spring