B56

Do I have to remove the turbo? I ask because my k04 is quite laggy below 3500rpm. Any advice on open wastegates or wastegates in general is appreciated.

WJM

May be "laggy" due to internal or external leak. Check your BPV

B56

BPV is good. I think I'm just going to unbolt the turbo and inspect it.

ModifiedA4

take a hemostat and clamp the compressor line from the turbo.

this makes the waste gate completely closed.

this is also dangerous to drive around like this, but good enough for a diagnostic.

at part throttle the turbo should kick in like a raped ape. as long as you drive at 1/4 throttle -you will be fine.

I would not suggest WOT.

if your wastegate is closed, you'll get the raped ape at part throttle. this means your lag problem isnt the turbo.

other things to do <b>first</b>:
-clean the TB and do a TBA
-check for boost leaks, check PCV valve under the intake manifold
-vag block 032
-log 3rd gear WOT block 115
-check the N75
-cat clogged?

B56

Although, what if i just unplug the n75 valve? would that work the same way?

ModifiedA4

i suspect its NO, (normally open)

like i said, be very careful, and take it easy.