Whats the problem when a car has an idle problem?

When a car has an idle problem, it means that the engine is not able to maintain a consistent speed when the car is not in motion. This can cause the car to stall, hesitate, or jerk when starting off from a stop. There are a number of different things that can cause an idle problem, including:

* Vacuum leaks: A vacuum leak can cause the engine to run too lean, which can lead to a rough idle.

* Idle air control valve: The idle air control valve is responsible for regulating the amount of air that flows into the engine at idle. If the valve is dirty or damaged, it can cause the engine to idle too high or too low.

* Throttle body: The throttle body is responsible for controlling the amount of air that flows into the engine. If the throttle body is dirty or damaged, it can cause the engine to idle too high or too low.

* Fuel injectors: The fuel injectors are responsible for delivering fuel to the engine. If the injectors are clogged or damaged, it can cause the engine to run too lean or too rich, which can lead to a rough idle.

* Spark plugs: The spark plugs are responsible for igniting the fuel in the engine. If the spark plugs are worn out or damaged, it can cause the engine to misfire, which can lead to a rough idle.

If you are experiencing an idle problem, it is important to have your car diagnosed by a qualified mechanic. The mechanic will be able to identify the cause of the problem and recommend the appropriate repairs.