What Causes Exhaust Pipe Shaking?

[Muhammad]

Exhaust pipe shaking can be attributed to the following reasons: Intake manifold or various valve leaks: When the engine's air intake is incorrect, it can cause the air-fuel mixture to become too rich or too lean, leading to abnormal engine combustion and resulting in engine idle shaking. If the leakage affects the engine's vacuum level, the engine may experience severe shaking, particularly more noticeable during cold starts. Excessive carbon buildup in the throttle body and intake passages: Too much carbon deposits and dirt in the throttle body and surrounding intake passages can change the cross-sectional area of the air passages. This makes it difficult for the control unit to precisely regulate the idle air intake, leading to an overly rich or lean air-fuel mixture and abnormal combustion.