Symptoms of Excessive Carbon Deposits in the Idle Speed Motor?

[WestonMarie]

Symptoms of excessive carbon deposits in the idle speed motor include: increased fuel consumption compared to before, excessive and unpleasant exhaust emissions, weak vehicle performance, poor acceleration, engine feeling sluggish, difficulty starting the car, and unstable idle speed that fluctuates. Below is additional information: 1. Idle speed control valves are typically in the form of electric valves or motors, installed somewhere in the vehicle's intake manifold. The valve or motor is controlled by the engine control module, which adjusts the idle speed based on parameters such as engine temperature and electrical system load. 2. When the idle speed control valve fails, it can cause various issues with the vehicle, even rendering it inoperable. Generally, a faulty or failed idle speed control valve will produce some symptoms that can alert the driver to potential problems.