Technician A says a vacuum leak results in less air entering the engine, which causes a richer air/fuel mixture. Technician B says a vacuum leak in the system can cause the engine to run poorly. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

A vacuum leak results in more unmetered air entering the engine, causing a leaner air/fuel mixture, not richer. However, a vacuum leak can indeed cause the engine to run poorly, making Technician B correct.

Technician a Says a Vacuum Leak Results in Less Air