Unstable Idling - Isuzu A-4JA1 Workshop Manual

Checkpoint
Continued from the previous page
OK
Valve clearance
OK
Compression pressure
2.

UNSTABLE IDLING

Trouble Cause
Valve clearance improperly
NG
adjusted
Blown out cylinder head gasket
Worn cylinder liner
NG
Piston ring sticking or broken
Improper seating between the
valve and the valve seat
TROUBLESHOOTING
Countermeasure
NG
Adjust the valve clearance
NG
Replace the related parts
183