2000 Toyota Celica GTS Check Light
My check engine light recently came on in my Celica, I took it to AutoZone, they ran that lil' test on it.. said I'm running too rich. I figured it was b/c I was running Premium Gas in it (sticker inside lid said to).. So I downgraded it to Plus after the guy deleted that alert. A few tanks of Plus later, my light is back on.. I plan on taking it back in to get tested again. Any other thoughts of how my Celica could be running "too rich"?