The lower octane has just caused your car to retard the timing. Once you get through this tank, fill up with 91 octane or higher (in CA, 91 is about the best you can get). I always fill my WRX at Chevron.

Then take your car home, shut it off, pop the hood and disconnect your negative battery cable.

Chill for about 10 minutes.

Come back out, reconnect the cable. Start her up and take her for a spin. Power should start getting set again.

Sorry that you lost your clock and radio settings And where do you live (city)?

 

He doesn't have to wait til he's empty, just use higher octane fuel and it'll balance out to 91 or higher, you also don't have to disconnect your battery, the WRX ECU is a learning ECU and it'll adjust to the higher octane without losing what it's learned on your driving style, radio settings, all that.

 

well that dealer is a retart. Let me break it down. I got a buddy with an automatic WRX with Catbak exhaust, intake, boost controller, and a BOV (i told him it was a waste of cach but he didn't listen) and I raced him in my WRX with the 5-speed BONE stock and I whooped his tail. The 5-speed can launch harder than the auto anyday unless your talking over 400hp so once again the dealer is a MORON.

 

race a stock WRX with a standard and an auto on the same track at the same time with 2 GOOD drivers. The stick can launch faster PERIOD. unless you do some transmission work to the auto it WILL NOT beat at stick with a GOOD driver.

 

to restet ecu disconnect the battery and press the brake for 5 seconds...does anyone have the site with directions? after u restet drive it hard for awhile till the ecu adjusts and you'll get the best performance