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Isuzu A-4JB1 - Unstable Idling

Isuzu A-4JB1
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TROUBLESHOOTING
183
OK
2. UNSTABLE IDLING
Checkpoint Trouble Cause Countermeasure
Valve clearance
OK
Compression pressure
Valve clearance improperly
adjusted
Adjust the valve clearance
Blown out cylinder head gasket
Worn cylinder liner
Piston ring sticking or broken
Improper seating between the
valve and the valve seat
Replace the related parts
NG NG
NG NG
Continued from the previous page

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