Pretty much as the title says, I have an 07 plate Audi A4 that started with the odd stutter and is now doing it in every gear, more and more, changed the MAF sensor EGR valve, cool air sensor, but no joy, my icarsoft reader is showing nothing, thinking of changing the N75 valve but unsure if this will help.
So am looking for someone with a code reader or a trusted garage to send it to.