Evaluation of ignition angle retardation

EVALUATION OF IGNITION ANGLE RETARDATION DIAGNOSIS

Indicated on display	Possible causes of malfunction	Corrective action
All cylinders greater than 12 ° CA	Knock sensor faulty	Check knock sensor. See KNOCK SENSORS, CHECKING .
	Connector corroded
	Knock sensor incorrectly tightened	Loosen knock sensor and tighten to 20 N.m.
	Loose components on engine	Secure components
	Poor fuel quality	Change fuel quality (see operating instructions)
One cylinder deviates significantly from the others	Connector corroded	Check knock sensor. See KNOCK SENSORS, CHECKING .
	Engine malfunction	Check compression: See COMPRESSION PRESSURE, CHECKING .
	Loose components on engine	Secure components