I have a 1994 acura integra ls. When I go and start it in the morning right as i turn the key and the ignition starts the car about 3 seconds after the car starts there is a buzzing sound that occurs for 2-3 seconds. It sounds like its coming from the front side passanger tire or the fuxe box. I am very Confused. some times when i hit hard bumps or potholes it makes the same noise. plz help.

Derek

 

Probably the ABS pumping up to operating pressure. That's normal. Open the hood & have someone start the engine while you listen. That pump is located just outboard from the air filter box.

If it takes more than 45 seconds to pump up then it sets off the ABS warning light...