check the Coils like mike said, i had the same issue with my 4.6l gt. picked up a used set and fixed everything. i had tried changing plugs also, but didnt fix anything.
http://www.weather.com/weather/alerts/localalerts/43035?phenomena=WS&significance=A&areaid=OHZ046&office=KILN&etn=0003
meh. just as i get the stang going again, i cant drive it... oh well., time for some all wheel driving!
179.99 new from jegs, i put this in late 2009. upgraded to a tko600 and no longer have any use for it. now 75 need gone tomorrow.
http://lh6.ggpht.com/_zt1IrYTCrOo/S24zta-2xdI/AAAAAAAAARw/X38T52exDIY/s640/2010-02-06%2022.25.18.jpg
http://lh3.ggpht.com/_zt1IrYTCrOo/S240XRqHMoI/AAAAAAAAARU/qtz75L39NG8/s800/2010-02-06%2022.25.28.jpg
easy hal, lol. baught a bolt extractor set, so i im going to use a cut off wheel to make the bolt short enough so i can get the rachet on the end of it. if that doesnt work, im going to burn it out.