Hi. Im new to this site so gentle with me... Recently purchased an a4 2.0 pd twin cam s line 140. Instantly noticed its got a few issues. Problems are; Poor starting without accelerator down. Poor low end power. Poor mpg. Air flow meter fault code keeps popping up but only happens on overrun. noisier induction sound compared to others i have driven. Generally noisey engine compared to others. spec 105k miles. just had oil. Fuel. Air filters and new glow plugs and air flow meter but still the same. im really stuck with this one as there is not other fault codes! ????????????