Two technicians are discussing the testing of a catalytic converter. Technician A says that a vacuum gauge can be used and observed to see if the vacuum drops with the engine at 2500 RPM for 30 seconds. Technician B says that a pressure gauge can be used to check for backpressure. Which technician is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. Technician A describes a method using a vacuum gauge to observe engine vacuum behavior, which can indicate exhaust restrictions if the vacuum drops significantly. Technician B mentions using a pressure gauge to directly measure exhaust backpressure, which is a common method to check for catalytic converter efficiency and blockage.

Two Technicians Are Discussing the Testing of a Catalytic Converter