Mercedes-Benz new C slowly idling down.

The reason why the idle speed of automobile drops too slowly;

1, water temperature sensor; This way of judging is to check whether the signal value of the water temperature sensor is standard through the maintenance diagnostic instrument or multimeter. Excessive resistance or poor contact will lead to high idle speed, otherwise it can be replaced or repaired.

2. Ignition timing; After checking the above maintenance suggestions, check the ignition timing. If the ignition timing is not within the standard range, the above adjustment will be invalid and the idle speed value will be too high.

3. throttling; First of all, under the premise of cleaning and adjusting the throttle, it is necessary to check the throttle return. If the throttle valve does not return well, the idle speed will be too high or unstable, such as the performance of the return spring and the clearance of the throttle valve plate, otherwise it will be adjusted or replaced.