What is the reason for the engine fuel filler door howling?

The howling of the engine throttle may come from the pipe connecting the air intake grille and the air cleaner, and the problem can be solved by fixing it with adhesive tape.

The whistle of the fuel filler door may come from the pipe connecting the air intake grille and the air cleaner, which is the thickest plastic pipe in the engine compartment. After opening the engine compartment cover, it can be cleaned and observed. There are ripples in the middle of the pipe. If you press the ripple by hand, will it weaken or disappear? If there is, try to fix it with tape and then tie it tightly, and the problem will be solved.

The engine oil filler door has a whistle, which is divided into the internal mechanical part of the engine and the external belt whistle of the engine. If it is suspected that water will reach the belt from the outside of the engine when parking and hanging the P-range fuel filler door, if the howling disappears, it is a loose belt or a quality problem of the belt itself. If there is howling after watering, it means it is an internal problem. There are generally two kinds of howling in the engine, one is the howling caused by the poor machining accuracy of the timing chain in the timing system, and the other is the howling caused by the large tolerance between the valve rocker arm and the hydraulic jacking cylinder in the valve train. It is recommended to report to 4S and disassemble the machine for inspection during the warranty period.