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boost issue
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  1. Bolt-on Tech (EJ225/257 2.5L 04-07 STi 06-07 WRX)
    Recently i got my 07 wrx tuned by yumi's in santa clarita, I am pushing 20 psi and do not have any problems when going through gears 1-3. Some times have the problem in gear 4 and all the time in gear 5. I do have an exhaust leak because the gasket connecting the downpipe to the muffler is going...
  2. Newbie Forum
    Hey guys, just installed a MishiMoto cold air intake into my 2011 Wrx. Noticed after install the slight power gain and the incredible sound difference. But i noticed since the install around 4K rpm the boost cuts? Or the car stutters. It’s weird. Seem like i hit a wall at 4K then after that the...
  3. Problem Diagnosis
    Hey everyone, My 2011 WRX is only making about 10 PSI of boost on a good day. I've had it as high as 12, but that's it. It's currently Stage 1+ with Cobb OTS tune (91 octane) and Cobb SF intake. 97k miles stock turbo (stock everything except intake). I took the IC off and noticed a thin layer...
  4. Problem Diagnosis
    I know there are multiple forums for this but none of them seem to be my exact issue or they are never solved. I have a 2003 Subaru wrx completely stock besides an exhaust. No matter what gear I am in I can only reach about 3-4 psi when the target boost is 14 psi. I once disconnected the vacuum...
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