No. 13 Knocking/Pinging-Acceleration/Cruise: Notes

DESCRIPTION & POSSIBLE CAUSES

13	KNOCKING/PINGING-ACCELERATION/CRUISE
DESCRIPTION	Sound is produced when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber).
POSSIBLE CAUSE	Engine overheating due to cooling system malfunction ECT sensor No. 1 malfunction IAT sensor malfunction MAF sensor malfunction PCM DTC is stored Low engine compression Excessive fuel pressure KS malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" . (See BEFORE SERVICE PRECAUTION .) (See AFTER SERVICE PRECAUTION .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

KNOCKING/PINGING-ACCELERATION/CRUISE

DESCRIPTION

Sound is produced when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber).

POSSIBLE CAUSE

Engine overheating due to cooling system malfunction
ECT sensor No. 1 malfunction
IAT sensor malfunction
MAF sensor malfunction
PCM DTC is stored
Low engine compression
Excessive fuel pressure
KS malfunction

WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:

Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" .
(See BEFORE SERVICE PRECAUTION .)

(See AFTER SERVICE PRECAUTION .)

CAUTION:

Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.