[qwikz28]

ok heres the skinny: i was doing stereo work to my car so i disconnected the battery negative so i dont kill myself and when i was all done i reconnected the battery negative. when i connected it the terminal sparked like hell but i connected it anyway and when i started my car back up it backfired to hell and hasnt run right since. it idles real low and feels a little hesitant. the engine also makes a wierd kinda knocking noise now. any help would be appreciated cause i was supposed to run down at atco tommorow for my first time.[/img]