Question: wrx how to check for boost leaks?
Answer: Step 1: Remove Flex Hose Between MAF Housing and Turbo Intake Pipe. ... 
Step 2: Pinch Off/Block Vacuum Lines. ... 
Step 3: Engine Safety Precautions - Oil Cap and Dialing In the Air Compressor. ... 
Step 4: Pressurizing the System - Start with a 5 PSI Trial Run. ... 
Step 5: Pressurizing the System - Using Higher Pressure.