Need some help chaps when I hit Boost in 4th or 5th gear I get a horrendous judder and the car struggles to get going ..... Any ideas what this could be ? I run the car on super unleaded and I've check the filter on the sender unit and it's clean as a whistle ?
Mine started doing this. Had them change the plugs when doing the clutch and problem sorted. Well overdue job as there was a 3-4mm gap when they removed the old ones, and black with it!
