What are the symptoms of a clogged exhaust pipe?
1 Answers
Symptoms of a clogged exhaust pipe include: 1. Weak acceleration: The engine may idle unevenly on the road, lack power when accelerating, and experience reduced intake air volume due to poor exhaust flow, leading to decreased engine power. 2. Frequent forced downshifting in automatic transmissions: A blocked exhaust pipe inevitably reduces engine power, forcing the driver to press the accelerator pedal harder to increase speed, which opens the throttle wide. The computer then controls the automatic transmission to force a downshift based on the throttle opening state. 3. Slight backfire during sudden acceleration: When the intake valve opens, the air-fuel mixture is still burning, causing the burning mixture to flow back into the intake pipe through the open intake valve, resulting in a backfire phenomenon. 4. The engine injects fuel and sparks, but fails to start, which is often a symptom of a completely blocked exhaust pipe.