Fuel Pump or Variocam
Just woundering an 97 Box driver experienced that, I found the engine sound suddenly boost up around 3,000 rpm when I hold the gear in 2nd, 3rd, 4th, may be in 5th (I'm not sure). I think the engine sound should be linear feeling and the Variocam may not be kicked-in at 3,000 rpm. Does anyone know this sympton about the fuel pump or really a Varicam kicked-in?
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