If the car was running before the filter change , you would think the answer would be there . Now that everything has been disturbed , have you tried a shot of starting fluid , if the plugs are in working order , and you have spark , the engine will fire up and die . That way , you know the engine and ignition system is in working order . Next , make fuel pump to turn on , with 75 or so fuel pressure [ measure this at the connection to the cold start valve ] , push down on the air flap , you should hear the injectors coming on , dont over do it , you could hydro lock the engine .