I'm new to this posting thing so cut me some slack
I know what the codes  are. and this is what I have done so far
VAG. group 115  840 rpm/   specified boost 1010mb/  actual boost 1380 that's over + or - "tolerance"
I checked charge air line's no leak's , vac. line's are fine, n75 fine, dv's are fine waste gates crack @ 12 psi.
like they should. checked the MAP plug w/voltmeter it starts at 5v and cuts to 3v as pressure creeps up to1380mb
MAF readings are fine.
WOT. run it doe's not over boost it spikes @24 and tappers to 22-23 like always
 but it cuts @ peak boost request  2800-3000 rpm
I don't want to throw parts at the problem is it the MAP ?
I don't think the MAP regulates psi it just monitors psi
Thanks
Some info on the car
EPL tune and fuel kit
franken's
3"downpipes no cats
awe twin II