Ignition Timing Is Being Discussed

Ignition timing is being discussed. Technician A says when the engine idle speed moves away from the desired idle speed, the PCM will adjust the timing to stabilize the engine speed. Technician B says when a knock is detected, the PCM retards the timing in fixed steps until the knock disappears. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Correct Answer:

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