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  1. General Maintenance, Troubleshooting & Accidents.
    2004 WRX 2.0 4A I recently put in the Grimmspeed 3 port boost control solenoid(I know it says to get a tune I'm just lazy), never tuned it but my boost would go up to 15psi and drop to 5-10 psi then right back up to 15 and back down to 5-10. Quite annoying, then all of a sudden it won't go over...
  2. General Maintenance, Troubleshooting & Accidents.
    2015 WRX has no boost passed 14.4-15.0. There seems to be no leaks from exhaust, boost or vacuum. I’m stumped to what it could be other than a bad boost control. I have a Grimmspeed 3 port kit on the car right now with 45k miles on it.
  3. Engine Modifications
    Ok so I went stage 2 MAPerformance OTS tune and I removed the restrictor pill. And yes before you ask I did remove the right pill 100%. The “T” with the black sleeve on it. The problem is when I would full throttle through gears and or sometimes around 50% acceleration or so the boost would max...
1-3 of 3 Results