While having a discussion, Technician A says that driving the car on the road or on a dyno is the best way to heat up the cat. Technician B says that it is best to run the engine in a stall. Who is correct?
A)A only
B)B only
C)Neither A nor B
D)Both A and B

Question

Quizplus · Accepted Answer

Technician A is correct. Driving the car on the road or using a dyno is the best way to heat up the catalytic converter as it will experience a wider range of operating conditions compared to sitting stationary in a stall. Running the engine in a stall will not provide sufficient airflow through the exhaust system to properly heat up the catalyst.

While Having a Discussion, Technician a Says That Driving the Car