this has happened in my dads car a few times before. it was a bad ground somewhere in his ignition system. after stalling, it would start back up after about 30 seconds of trying to start the engine (it would turn over, just not fire) after cranking it for a while it would slowly putter, sounding as if it started with 1 cylindar and worked its way to eight. after getting moving while it was running like crap, it would suddenly start running normally. if i were you, i would check all your grounds and make sure they are properly fastened