You need to check for spark, fuel pressure, injector pulse and whether the cam is in time. Sorry, can't be more specific but you haven't given me much info to work with.
If you want to find a specialist, here's a directory link for you:
Hey, Thanks I"ll keep that information. I had my car towed to a Mitsubishi dealer and they couldn't find anything wrong with it by dianostics. They kept driving it around but it never stalled for them. I"m picking it up today. Probably will stall on me. lol... Deliah