hi, i have a problem with my a6 1.8turbo its a aeb engine. i get a strange noise between 2-3k rpm it sounds like a fuel pump running dry but doesnt effect perfomance at all, if i put my foot down a tiny bit the noise goes higher pitched and goes away. i did read somewhere about an audi recall where changing some pipework so its the same as an auto setup but cant find it and its really annoy me now. i did have a vaccum leak and it went away but obviously there was air leaking(was from the dumpvalve) any help would be great. cheers