What are the symptoms of a faulty timing tensioner?

[VanRobert]

Symptoms of a faulty timing tensioner are as follows: Increased fuel consumption, lack of power, and engine knocking: Under the drive of the timing belt or timing chain, the camshaft controls the opening and closing of the valves at the correct time, coordinating with the pistons to complete the four processes of intake, compression, power, and exhaust. Since timing belts and chains can experience jumping during medium to high-speed operation, and timing belts may stretch, deform, or skip teeth over time due to material wear and stress, this can lead to inaccurate valve timing. Consequently, it may cause issues such as increased fuel consumption, lack of power, and engine knocking. Engine damage: Excessive tooth skipping can cause the valves to open too early or close too late, resulting in the valves colliding with the ascending pistons and damaging the engine.