Possible plugged exhaust....

Hello mommy2avery. It could be a plugged exhaust. Due to loss of power while driving then having a no-start after it died out leads me to this possible answer. Think of your engine as a vacuum cleaner(sucks air through on one end and pushes air out of the other end). If it can't push air out(plugged exhaust), then it can't pull air in. Good way to check, start you vehicle and let it warm up, while parked of course, rev the engine up to 2,000 r.p.m. for 1-2 minutes if you can. Then let it idle, look under the vehicle for your exhaust pipe(pay close attention to your catalytic converter) if any of it that you can see turns bright red, orange, or white hot; then you know your heating up your catalytic converter(CAT's are not suppose to get that hot) which means plugged exhaust. hope this helps.

p.s. this shows what a catalytic converter looks like(it's not a muffler)http://en.wikipedia.org/wiki/Catalytic_converter