The idle air control valve (IACV) is a device attached to the throttle body that helps keep the engine of a vehicle running without throttle input, such as when the car is idling in traffic or parked ...

Intro: A graph of your car’s idle speed shouldn’t resemble architectural plans for a new Cedar Point roller coaster. Once the car warms up to normal operating temperature, it should run in a smooth ...

Modern engines contain dozens of sensors and controllers, most of which behave well over the life of the vehicle and never have to be replaced. But every once in a while there’s a bad apple that can ...