What Are the Symptoms of a Blocked Exhaust Pipe in a Diesel Vehicle?

[BrooklynAnn]

Diesel vehicle exhaust pipe blockage symptoms are as follows: 1. Weak acceleration: Difficulty in increasing engine speed and vehicle speed due to reduced intake air caused by poor exhaust flow, leading to decreased engine power. 2. Frequent forced downshifting in automatic transmission vehicles: Due to exhaust blockage reducing engine power, the driver must press the accelerator deeper to achieve more power output, causing the throttle to open wide. Consequently, the ECU controls the automatic transmission to force a downshift based on the throttle opening state. 3. Slight backfire during sudden acceleration: When the engine exhaust is obstructed, some exhaust gas remains in the cylinders, thinning the air-fuel mixture and slowing combustion. The mixture continues to burn when the intake valve opens, causing the burning mixture to backflow into the intake pipe, resulting in backfire. 4. Rattling sound from the exhaust system: This is often a symptom of a damaged catalytic converter, and a broken catalytic converter can easily cause engine exhaust blockage.