In the future, this page will contain a write-up for cleaning your intake of built up carbon, as well as examining for vacuum leaks. As part of the intake service, you should also inspect your idle air control servo
Boost leaks occur when a connection for charged (pressurized) intake air is not sufficiently tight to hold the maximum boost pressure of the system. The result is that when the intake reaches a certain pressure, the connection releases air, which causes two issues. It causes the boost pressure to fall which hurts horsepower, and also allows air to escape the intake which throws off the ECU's air-fuel ratio calculations.
To remedy this, first snug up all easily accessible connections in your intake system and check if the issue is resolved. If it is not, borrow, purchase or build an intake pressure tester which allows you to pressurize your intake manually with an air compressor. Check and ensure that the intake will accept and retain the pressure expected of the system (stock USDM TT's should hold at least 10psi). If it holds the requisite pressure, move on to another potential cause. If it doesn't, attempt to isolate the source of the leak. You can help visualize the leak by spraying soapy water on the connections and looking for bubbles. Once isolated, tighten the connection, test and repeat this process.
This section is a stub, it will be expanded in future updates.