Well, ever since I figured out that the correct type of gas for my 04' WRX was octane 93 thats all I have been putting, ran good except for hard to turn on due to low charged battery(fixed).
Unfortunately, yesterday my father borrowed the car and today the car has been acting very weird......
* Weird click noise after releasing the throttle petal(rev).
* When warm, the car started to shake (I felt it -_-) all while smoke was coming out from hood scoop.
All I would like to know if the gas that my father put caused this or just a coincidence. Also if that weird noise a rod Knock.
04' WRX 145k miles Stock.
History of P0304, still trying to fix- Next attempt replace o2 Sensors.
Thanks in advance for everyone that has helped, seriously.