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Isuzu A-4JB1 - Page 189

Isuzu A-4JB1
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TROUBLESHOOTING
186
OK
OK
3. INSUFFICIENT POWER
Checkpoint Trouble Cause Countermeasure
Injection pump Worn plunger Replace the plunger assembly
Worn camshaft (In-line pump only) Replace the camshaft
Worn roller tappet (In-line pump
only)
Replace the roller tappet
Worn cam disc (VE pump only) Replace the cam disc
Turbocharger
Booster compensator pipe
broken or cracked
Replace the booster compen-
sator pipe
Exhaust gas leakage from the
exhaust system
Air leakage from the intake system
Repair or replace the related
parts
Defective power echo gate
Repair or replace the power echo
gate
NG NG
NG NG
NG NG
NG NG
NG NG
NG NG
NG NG
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