Check fuel pressure and check the hose to the map sensor. If the map sensor is working but the hose has fallen or rotten off, this won't set a code. Also if you're concerned your temp gauge is reading wrong, try unplugging it. It'll start but will just rev a bit high on initial start-up and the rad fan will engage. You can pull a tire, pulley, belts and the plastic covers on the engine to check cam timing but I doubt it jumped. Can't hurt to check though. Does giving it a bit of throttle keep it running or does it still die? A compression check wouldn't be a bad idea either.