Ford > Engine > Spark Control > Spark Retard

Knock

• Knock Global/PerCyl: Selects if the knock system is using global or per cylinder retard methods.
• Knock Minimum Load: Below this Load, knock control will be disabled.
• Knock Maximum RPM: Above this RPM, knock control will be disabled.
• Knock Minimum RPM: Below this RPM, knock control will be disabled.
• Knock Minimum ECT: Below this ECT, knock control will be disabled.
• Knock Retard Limit vs. RPM vs. Load: This is the maximum amount of spark retard the knock system can command when knock is detected.
• Knock Retard Rate vs. RPM: The rate that spark is retarded when knock is detected. Higher numbers mean faster retard.
• Knock Advance Limit vs. RPM vs. Load: This is the maximum amount of additional spark advance the knock system can command when no knock is detected.
• Knock Fast Advance Rate vs. RPM: The rate in seconds/degree that spark is added when no knock is detected and the fast advance rate conditions are met. Higher numbers mean slower advance rate.
• Knock Fast Spark Advance: The spark will be advanced by this amount per process loop until knock occurs.
• Knock Advance Rate vs. RPM: The rate in seconds/degree that spark is added when no knock is detected. Higher numbers mean slower advance rate.