two things that you might try: unplug the map sensor-the ecm will default to baro then see if it will start, if it does you need a new map; the other will require either a second person to turn the motor over with the key or you could use a remote start button, with the motor turning over tap the distributor cap with the handle of a screwdriver if the motor tries to start or stumbles more than it has replace the hall effect pickup.