Hi guys i bought a 02 wrx about 2 months ago and it has a bad sputter and flashing check engine light at high rpm only with the electronic boost controller on. I have replaced the plugs twice and properly gapped them just to be sure. The mass air flow sensor and fuel filter were also just replaced. The car also had a custom dyno tune done. I did recently discover that the car also does have a manual boost controller under the hood so i turned it all the way down with the problem still persisting and im wondering if the vaccuum lines would be wrong having the manual and electronic boost controllers both installed.by the way the car also has a aem intake and full injen ses exauast. If both boost controllers are turned off all the way the car runs like it normally should with no problems.