Re: sputtering Stang!!
Best place to start, make sure your spark plug wires are not rubbing against the headers/arcing out - then move on to cap/rotor/plugs (make sure none are fouled out or worn) make sure the connections for each wire are good also
It couldn't hurt to hook a fuel pressure gauge up, either
2012 IS F Blue IS F Sport
2006 Mustang V6 wannabe