Buzzing noise

[Mikey22]

Hey Guys,
 
Very simple, I have a loud buzzing noise coming from my coil packs......does this mean anything?
 
Just wondering if it should buzz or not.
 
cheers
 
Mike

[Dragun]

Depends how loud but a buzzing coilpack is usually down to an electrical issue. Either connections are loose, seated dodgy, crack in one of the ignition amps.

If your car has an immobiliser try turning the car on with the immobiliser off, if there\'s a noise it\'s not electrical, if once you switch the immobiliser on and turn key to ACC there is a buzz, it\'s the electrical feed from the ecu causing it, so something on the pack must be cracked on not plugged correctly or something come loose.