Hi have an Audi A4 170. It's been remapped because of a filter fault. I am now experiencing white smoke from the exhaust when idling, and a strong smell of unburnt fuel? I think that's what the smell is. I seem to be chucking money lately at it , i even had a diagnostic on the car but they coudlnt find anything. People that I ask keep saying it could be injectors but the were replaced a couple of years ago. A friend is now saying it could be a EGR valve. Has any body come across this problem before? Thanks. One very frustrated audi driver.
