Two different issues here: pressure and vacuum.
The mechanism that meters fueling is called the ALDA. A
pressure hose goes from the intake manifold to the ALDA. If pressure doesn't reach the ALDA actuator due to a clogged nipple, deteriorated hose, or leaky ALDA your engine will not get sufficient fuel, there will be a loss of power and harshly shifting transmission as a result of mismatched power to clutch pressure ratio.
The mechanism that meters boost is the wastegate actuator. A
vacuum line is feeding pressure from a switchover valve and vacuum transducer to the actuator. At idle you should have Vacuum pressure equal or near system values ~25MMhg I believe.
Double check this number elsewhere but I believe our cars run around 1 bar or 14psi at WOT or thereabouts. T a vacuum/pressure gage to the intake/ALDA line run a hose to the interior, hook up the gage and go for a drive. Note the pressures at idle partial, and full throttle. Once that is done we can troubleshoot from there.
This will show both pressure and vacuum.
https://www.harborfreight.com/automotive/diagnostic-testing-scanning/fuel-pump-and-vacuum-tester-62637.html
get enough of this
https://www.pelicanparts.com/More_Info/0079976182.htm?pn=007-997-61-82-M22
and two of these
https://www.pelicanparts.com/More_Info/1162760929.htm?pn=116-276-09-29-M22
and one of these
https://www.pelicanparts.com/cgi-bin/ksearch/PEL_search_2016.cgi?command=DWsearch&description=1170780145
Check for veracity but it should get you started...