Technician A says that a vacuum gauge measures the difference between intake manifold vacuum and atmospheric pressure. Technician B says that a vacuum gauge can help to diagnose worn piston rings. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. A vacuum gauge measures the difference between intake manifold vacuum and atmospheric pressure, which can be used to diagnose engine problems such as worn piston rings.

Technician a Says That a Vacuum Gauge Measures the Difference