Question

A says that the spark timing adjustment procedures for a vehicle can be found on an underhood label for all cars built since 1972.

B says that on any engine with a distributor, spark timing can be adjusted by rotating the distributor with respect to the cylinder block (cylinder head)

-A
-B
-Both
-Neither

Answer 1

Both A and B statements are correct. The spark timing adjustment procedures for vehicles can be found on an underhood label for cars built since 1972. Spark timing can be adjusted by rotating the distributor with respect to the cylinder block or head.

Step-by-step explanation:

Spark Timing Adjustments for Vehicles

Both A and B statements are correct.

A: The spark timing adjustment procedures for a vehicle can be found on an underhood label for all cars built since 1972. This label provides information about the recommended spark plug gap, spark plug type, and other important details related to the ignition system.

B: On any engine with a distributor, spark timing can be adjusted by rotating the distributor with respect to the cylinder block or cylinder head. The distributor controls the timing of the spark ignition and can be adjusted to optimize engine performance.

Spark timing adjustment is crucial for the efficient operation of an internal combustion engine. It determines when the spark plug fires, igniting the air-fuel mixture in the cylinders. By adjusting the timing, the engine can achieve optimal power, fuel efficiency, and emission levels.