I was thinking of the accelerator electronic mechanism, as long as its not at rest it could make a noise? I dont know exactly how it works but it can move the gas pedal on its own when in cruise control, check it out its freaky
. When you press the gas its constantly under some sort of tension. I assume it must be electrical since it has no vacuum hoses going to it possibly its some sort of solenoid to move the pedal electromagnetically?
However that should mean it would make a noise even when car is stopped in neutral and revved.
Maybe there is nothing in there to make a noise anyway.
