Fjames

@Fabiasi any chance you could post what the resolution was?

Hi, apologies for the zombie thread revival but this topic appears high in google and is exactly the issue I have with a 2013 Citigo. Wondered whether the author found what the fault was or meantime if anyone else has had this same issue. it's a constant wooooooooooooooooooooooo noise when running. I can't place the origin of it in the engine bay. As per the original post if you put finger over end of pipe that goes to rocker cover valve the noise goes. sometimes get a little chirp of the same noise after engine has shut off (around same as the throttle valve control motor does its little reset). could just be me but when revving the engine the noise appears to drop off when the revs are dieing but comes back as idle engages again. Any help much appreciated.