Intake manifold vacuum decreases and increases as the engine is accelerated and decelerated.

Name: Intake manifold vacuum decreases and increases as the engine is accelerated and decelerated.
Brand: Quizplus
Rating: 4.9 (33 reviews)

Question

Quizplus · Accepted Answer

The intake manifold vacuum decreases as the engine is accelerated because the throttle is opening to allow more air and fuel into the combustion chamber. The vacuum increases as the engine is decelerated because the throttle is closing, restricting the airflow and causing a higher vacuum in the intake manifold.

Intake Manifold Vacuum Decreases and Increases as the Engine Is