When Mazda Angkor Serra is idling, it is whirring at the throttle.

Does the subject want to ask "what happened to the throttle when Mazda Angkor Sera was idling?"

1. There is too much carbon deposit in impurities. During the intake of the engine, impurities and air will enter the throttle valve together. These impurities will accumulate at the throttle for a long time, and the carbon deposition of impurities will be more and more after a long time.

2, sludge accumulation, sludge accumulation on the edge of the throttle plate, the idle intake of the straight-through idle speed control system is obtained by the throttle opening driven by the motor, and the throttle opening is very small at idle speed. Due to the sludge jam at the throttle edge, the air intake is insufficient, which reduces the engine speed.