It controls the idle speed. It should not buzz. To rule it out, try unplugging it. "Stian Birkeland " wrote: > Idle speed motor, you say. What is it for and is it dangerous if it > buzzes? > > I also have to tell that when I started the car, the car idled fine > around 775 rpm...so if its the idle speed motor that buzzes, WHY does > it do this? > > Stian