DMAC
Well-known member
Every once in a while (around every 2 weeks), I turn on my 09 Jetta TDI and it starts without any problems. About half a second after the engine starts, I hear what sounds like a backfire in the engine. It only does it when the engine is cold. This is my first diesel so I don't know if this is common. Is it bad? Should I take it to VW?