Two technicians are discussing engine vacuum readings. Technician A says that a fluctuating vacuum gauge is a sign of a vacuum leak. Technician B says that a fluctuating vacuum gauge is a sign of possible engine problems. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct. A fluctuating vacuum gauge reading can indicate a variety of engine problems, such as a misfire, incorrect valve timing, or low compression, not just a vacuum leak. It is important to diagnose the specific issue causing the fluctuation.

Two Technicians Are Discussing Engine Vacuum Readings