Alright well my girlfriend has a 99 A4. it is having a couple problems and i was wondering if an of ou might have a idea of what the problem is. First off every once and a while it won't start, it turns over fine but i won't start and then if i push that pedal all the way down and cut fuel off it starts. its done that maybe 8 times in a month and half. i pulled the hose off the regulartor but no fuel came out of it so i have no clue on the problem. And about month ago it started making a rattle or a clacking under the hood. The only time it makes the noise on the on down rev. when it i reved up you don't hear it, but when it down revs it can be heard. It sounds like it is coming from theback side of the motor is the region of the turbo. The car is a 1.8t with a auto. Any help you guys can give would be great . Thanks