So I got an 02 wrx all stock only thing has 06 wrx turbo and intercooler. Boost fluctuates from .1mpa back to half mpa then back up to .1 mpa on wot or even three fourths in. Need to know if anyone has any ideas. I was told maybe restrictor pill since it is a diff year or maybe bcs. Just need to get a few more opinions to see what route I can take. Thanks