ok, i disconnected the + battery cable for 5 minutes. Then reconnected it, started the car and let it run, but i think i cut the time short cause now my check engine light is on. AutoZone told me it was the knock sensor, its causing my engine to start farting around 2500 RPM. I tried reseting the ECU again, then light and problem are still present. Anybody have any tips or ideas on wtf i did to my wonderful car?
Please help

 

Pull the code yourself.

http://forums.maxima.org/showthread.php?threadid=104931