Hey folks I was in Dublin today and got back to Kilbeggan and pulled up in drive and turned of motor and left turbo timer to do its job and then the car started to rev up and down as if its was gasping for air so I gave it a quick rev and it stopped now I did take out K&N filter out yesterday and cleaned it with an air gun do you think that may have caused the problem many thanks John L. PS She was fine all day many thanks.