Evaluation ignition angle retardation

EVALUATION IGNITION ANGLE RETARDATION CHART

Indicated on display	Possible cause	Corrective Action
All cylinders greater than 12 °KW	Knock sensor malfunction	Check knock sensor. See KNOCK SENSORS, CHECKING .
	Connector corroded
	Knock sensor incorrectly tightened	Loosen knock sensor and retighten to 20 Nm.
	Loose components on engine	Secure components
Poor fuel quality		Changing fuel grade
One cylinder deviates significantly from the others	Connector corroded	Check knock sensor: KNOCK SENSORS, CHECKING .
	Engine malfunction	Check compression: See COMPRESSION PRESSURE, CHECKING .
	Loose components on engine	Secure components