check the inj for ohms. check the map for voltage. get a pinout diagram of your ecu so you can pull the cover to check the map voltage or strip back some wire on the map sensor plug and check voltage. one wire will be ground, one will be 5v, and the other should be close to 3v key on engine off. make sure you keep the map sensor plugged in when doing this so you complete the circuit and see what the map is actually doing.