I got a 05 vector and its not running very good. It's not running on all cyl.at a idol it pops,backfires misses at high speed it seems to smooth out but it's hard to tell. The weid thing is a week ago it started and ran just fine with no problems. I've did the simple things new plugs,looked for lose wires check carbs for dirt.I'm need some help,some ideas HELP!!!