What if Passat's waiting speed is too low?

Your description of the fault phenomenon is very detailed. The reason for the low idle speed or even flameout is that the engine load has increased, but the engine did not immediately increase the idle speed. It is recommended to check whether the throttle opening increases with the increase of engine load signal. If the accelerator stepping motor is damaged and the accelerator opening is unresponsive, the fault can be solved by replacing the accelerator. Check whether the pressure of the fuel system meets the original technical standard; Check whether the signal of the air flow meter exceeds the standard value.

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