One-sided Exhaust Pipe Jitter of Audi v6 Engine

Causes of engine unilateral exhaust pipe jitter;

1. The intake manifold or various valves leak. When the intake of the engine is incorrect, the mixture will be too rich or too lean, causing the engine to burn abnormally. Will lead to engine idling jitter.

When the position of air leakage affects the vacuum degree of the engine, the engine will shake violently, which has a great influence on the idle speed of the cold car.

Common reasons are: air leakage caused by aging of intake manifold gasket, damaged intake manifold or worn holes of other parts, vacuum tube plug falling off, EGR valve damaged and not closed properly, etc.

2. There is too much dirt on the throttle and air intake. Too much carbon and dirt are deposited in the throttle valve and the surrounding air intake, and the cross-sectional area of the air passage changes, which makes the control unit unable to accurately control the idle intake, resulting in the mixture being too rich or too thin and abnormal combustion.

The common reasons are: carbon deposition on the throttle, and oil pollution and carbon deposition on the air intake around the throttle.

3. Idle air actuator failure Idle air actuator failure leads to inaccurate idle air control.

The common reasons are: the throttle motor is damaged or stuck, and the throttle valve plate is stuck with carbon deposition.