misfire diagnosis

[CarbonZX]

i was being a little hard on my motor, doing a burnout, and i f***ed it up.here are my codes-po325 knock sensor-po301 cylinder misfire cylinder 1-po135 o2 sensor

the car when i drive it sounds like an old flathead v8 or something, and you can hear the misfire more from the exhaust than the motor. i already checked for spark in cyl 1 with a spark tester and i have it. i have had the valve cover off and nothing appears broken. i didnt have the socket to actually pull the spark plug out though so i couldn't check its condition.

anyone have any idea what kind of problems i could be lookin at here?

[Klits562]

do a compression test

[r3v_v3ng3]

also check your injectors (pull out the connectors and do an ohms test)