quick query...?

[ade_aidy_ady]

on a fully standard car...... should u be able to hear the turbo whistle.... when u boot it then let off

ive been reading that this noise psssssssssssssst could be a duff diverter valve.......? cars 2000 45k miles......

vagcom is throwing up "pressure drop between turbo and throttle valve"..............................?

[Adam]

Have you also looked for a boost leak?

[ade_aidy_ady]

checked pretty much all pipes up around the diverter valve etc.... but all seem ok............?

should this pssssstt or woooooosh noise be audible on a fully re-cirulating turbo car when u acclerate and let off.............?

[richw911]

You will hear it.

17705 

Could be cracked re-circulating valve or a leak - check the pancake pipe joints for signs of oil 

[Wazzzer]

I found my old standard valve the other day, looks fine but I can blow straight through it and that was 52k miles when I replaced it

[ade_aidy_ady]

thanks for replies....

can the pancake pipe be easily viewed from lifting the bonnet or is it a raise and look underneath job.............?

also been getting this code recently.............17608 - "boost presure control valve" (N249) - mechanical malfunction

would this possibly have anything to do with a faulty diverter valve.............?

[Wazzzer]

pancake pipe is behind your drivers wheel

as for the code, have a search, you'll find loads of topics as it's a sore subject for AUM/AUQ owners 

[jeynesey]

pancake pipe is behind your drivers wheel

as for the code, have a search, you'll find loads of topics as it's a sore subject for AUM/AUQ owners 

AGU ftw. Mine was completely mashed when I replaced it, could put my thumb through a hole in the side!!