What is the reason why FAW-Volkswagen makes a lot of noise when exploring songs, and it always rings a few times?

When there is noise when the engine is speeding up, the throttle should be considered first. This will happen if the throttle is dirty. You can consider cleaning once.

2. Air leakage in the intake manifold. When air, gasoline vapor and combustion exhaust gas that should not enter enter the intake manifold, the mixture will be too rich or too thin, resulting in noise when the engine is speeding up.

3. There is a problem with the ignition coil or spark plug of the ignition system, which may also cause such a situation. It is the easiest to check the spark plug, and the carbon deposit on the electrode is clear at a glance.

4. The oxygen sensor of the intake and exhaust system sometimes breaks down, resulting in inaccurate intake data and loud engine noise during acceleration.