i know this is an old thread....think this happeing to my car, give it some welly and back of the throttle and there is a sharp "hissing" noise, firsy thought is was my connectors to the boost gauge/D.V but after reading this i lthnk i might get the car in the air in the morning....Mk4 ibiza cupra!!
amy suggestions guys???? cheers
amy suggestions guys???? cheers