I road my 700 over to a buddies house tonight to watch the ufc fight and when I went to start it to go home, it backfired and wouldnt turn over. We pulled the plug and it was black. Upon trying to get it to fire it smelt really rich. I havn't had any problems until now after installing my mods which include pcIII, hmf full sport, and k/n intake lid off. What gives?