XC90 T6 -- Low boost? Hjelp!

[Swaybars]

And to be clear: you never knew of the "before" situation? It has always been the case of low boost while you've owned it?

I've had this car for about 5 years. Just got a DICE and VIDA recently, so I haven't really noticed this before. I will say that the car only sometimes felt like 270 HP/280 lb-ft. Occasionally you'd hear turbo noises and it would pull pretty well, other times it did just feel a tad...flat? Lots of engine noise, no turbo spool noise, not much pull.

When I was running the car stock to log data, boost behavior was less aggressive. 2nd gear pulls usually saw the TCV cut boost a little, which was weird because it was still well below 8 PSI if IPD is to be believed on those stock numbers. I can link those images if it would help! Have screenshots.

[SuperHerman]

Have you checked all the little hoses to and after the boost solenoid (one by the air filter box)? There are two short ones right around the Bank 2 turbo that go bad. The ones that go from there to Bank 1 seem to hold up well.

You can put a Mini-Vac on the line and see what action you get.

Also the Bank 2 turbo seems to be the one that fails first. On my old 2004 it was leaking oil, but not smoking. I had no leaks.