Service manual

TROUBLESHOOTING
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 1C-25
Miscellaneous
Location / Noise Possible Causes
A. Advanced timing
B. Low octane fuel
Engine spark knock
C. Engine running hot
D. Carbon deposits in engine
A. Wrong ignition timing
B. Carburetor set too lean
C. Faulty accelerator pump
Popping through carburetor
D. Vacuum leak
E. Valve adjustment
F. Valve timing
G. Burned or stuck valve
A. Vacuum leak
B. Leaking exhaust (manifolds or pipes)
Hissing
C. Loose cylinder heads
D. Blown head gasket
A. Vacuum leak
Whistle
B. Dry or tight bearing in an accessory
A. Leaking high tension lead
Sparks jumping
B. Cracked coil tower
C. Cracked distributor cap
A. Drive belt slipping
Squeaks or squeals
B. Dry or tight bearing in an accessory
C. Parts rubbing together
Rattling in exhaust pipe area A. Exhaust shutters
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