Hi, Just aquired a 2005 A3 140 TDI Sport. Very spluttery start, sometimes takes a few turns before it does start, seems to be worse when the engine is warm. Also, the cars turbo is very vocal, especially in low gear, even with my foot off the throttle it's wining away. Put the foot down and in the lower gears it sounds like it's got a dump valve. I'm pretty sure it hasn't. Any suggestions??