Hi there, recently bought an A3 1.9tdi 04' and for some reason when Ive been out and about, stop the engine to pop out, upon return to get back on my way the engine turns over long than normal and sometimes pops like a small backfire. I wondered if anybody else had experienced this or may have some ideas what it could be, please help.

I've taken the car back to the garage where I bought it and they cant find anything wrong with it. A friend who works at a garage as had a look and he says it seems fine. He did say that the tick over is a little high. He suggested it could be something to do with the engine management system??

The car runs great but this is a little irratating, can anybody put my mind at rest.

Many thanks,

Steve.