Constant Humming Noise Car MY 95 Neon Has A Constant Ooo/humming Noise When I Turn On The Engine And Gets Louder After The Car Warms Up?

MY 95 Neon has a constant ooo/humming noise when I turn on the engine and gets louder after the car warms up? - constant humming noise car

My 95 Neon has been a constant hum moderately high (about one octave above middle C) ooo / to start the engine and increasingly after the car warms up. It is a constant beep and stops when the engine is turned off. This does not change with RPM or gear or the speed of the vehicle. He is being inexorably mad. If the fuel pump? / Radiator water pump? I had checked the belt, and the man said, they are good. It does not seem to hear the noise, because the car is not heated (already available but not) be distinguished.