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  1. General Maintenance, Troubleshooting & Accidents.
    Hello i have a 2012 WRX Premium with 80k miles recently i had a check engine light come one. When i put it on the scanner it came up with P0172 so i cleared code and bought up and down stream o2 Sensor. I installed Down Stream o2 sensor and when i went to install upstream it was the wrong...
  2. Engine Modifications
    Hello 2020 Wrx Cobb big sf intake ambot stage 1 OTS tune on 91. AMBOT said that mixing 3 gallons of E85 was fine for the tune as long as I fill up the rest with 91 so I did. BUT the E85 I used was in a gas can I've had for about 4-5 months sitting in my garage. Since then about a tank later I...
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