While having a discussion, Technician A says that a backfire is an explosion that occurs in the intake system. Technician B says that a popback is an explosion that occurs in the exhaust system. Who is correct?

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are incorrect. A backfire occurs when the air-fuel mixture ignites in the intake manifold or carburetor, while a pop-back occurs when unburned fuel ignites in the exhaust system.

While Having a Discussion, Technician a Says That a Backfire