I have the 17705 code up, has been there on and off ever since I got the car and the previous owner also had it (they changed the DV to a Forge one but code kept coming back). The car is a 2001 facelift 1.8T Quattro (ARY engine code).
Recently, I have been getting an intermittent problem with stalling, in that when I depress the clutch the revs fall down to zero instead of dropping to 800ish and levelling off. Sometimes the engine catches itself and doesn't stall, after which it idles around 800rpm, other times it will just cut out. It starts again immediately but the problem persists. It is intermittent in that it can happen for a whole journey, but say 3 hours later when I return to the car it will be running fine.
I know a number of things can throw up 17705 including a boost leak due to split hoses, but where should I be looking? Please bear in mind my knowledge of the engine bay, layout and pipes is VERY limited so please spell it out to me if you can!! Failing that, anybody else had similar symptoms that could give me any ideas of what to be checking?
Thanks in advance for any pointers,