Ignition Timing Is Being Discussed

question 33

Multiple Choice

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

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