What are the symptoms of excessive carbon deposits in the idle motor?
1 Answers
Symptoms of excessive carbon deposits in the idle motor include: unstable power output during acceleration or overtaking, accompanied by dull abnormal noises from the engine; difficulty in starting the engine when cold, with continuously increasing fuel consumption; pungent exhaust fumes and a large amount of sludge and colloidal substances inside the exhaust pipe. Below is an introduction related to the idle motor: 1. Introduction: The idle motor is a component that controls the idle speed of a motor vehicle. When the engine runs without load, it is referred to as idling. 2. Function: The idle motor is primarily responsible for managing the vehicle's idle speed, aiming to adjust the idle based on the engine load during idling. The idle stepper motor is mounted on the throttle body and is used by the engine control unit to regulate engine idle speed. When the engine speed deviates from idle, the throttle valve adjusts to control the amount of air entering the intake manifold, operated mechanically by the accelerator pedal cable. The throttle has a bypass air passage that supplies air during engine idling (when the throttle is closed). The pivot of the automatic idle motor extends into the bypass air passage, regulating the air flow through it. The engine control unit uses input signals from various sensors to move the pivot of the automatic idle motor in and out of the bypass air passage, thereby adjusting the engine idle speed. The automatic idle motor begins operation when the ignition key is turned to the 'on' position. This switch signal is input to the ECU to determine whether the engine is in idle mode. Additionally, the motor's current position is fed back to the ECU by the motor position sensor.
