You also need a steady supply of air(oxygen). Any hissing sounds? Check for loose, disconnected, and split vacuum lines. When was your last complete tune up? Mike's spark test will help with this check, but look over the plug wires for unusual appearance. Run car in dark to look for sparks, arcing from ignition system/ wires. Check condition of plugs as part of spark test. Make sure you get a strong blue spark. Dirty or very worn plugs can be the problem or indicate one. If it has a distributor, look for cracks in cap, wear and/or buildup on its and the rotor contacts. I think its Berrymans' -12 fuel cleaner that is recommended by other posters in helpoing cleaning out the entire fuel system safely, especially the injector ends. You should use the search feature to find similar posts about rough idle, starting, stalling. One in particular I remember, though it is for a Taurus, is
http://www.automotiveforums.com/vbul...d.php?t=880923