When fitting my new ultra white bulbs I had the ignition on to check they worked and when I got to the front of the car with the bonnet up I could hear a strange high pitch buzzing sound and it was coming from the new throttle body ( de lipped and polished) that I fitted the other day is this normal or should I swap back to the standard throttle body ? The car seems to run ok idles as it should and pulls well.
Throttle body noise ??
- Thread starter mitch1990
- Start date
Wouldnt worry about it mate, iirc think mine does that aswel. stops when the car is running. mine is also de-lipped :thumbup1:
tchalikias
Paid Member
With the ignition on, the stepper motor inside the throttle body is turned on, producing a characteristic high pitched whine. It's perfectly normal.
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