1993 Ford Tempo I have tried everything

Engine Mechanical problem
1993 Ford Tempo 4 cyl Front Wheel Drive Automatic high miles

yeah I hope someone can tell me what I am doing wrong with fixing my car. Two weeks ago it was broke down and wouldn't start for nothing. So I put a new battey in it and drained the old gas out and put fresh gas in. Well it fired up but wouldn't stay runnin so I screwed the screw on the thotal arm in and it reved a lil bit high but stayed running I ran great for two weeks and then staled out and now will not fire up it turns over but not getting gas from the filter to the motor so I think its the injectors but I wanna know if there is a way to take them off and clean the line at all I know the fuel pump works I have tested it but it just isn't gettin fuel to the motor. Can anyone tell me what I need to do to try and fix this pos heck thats what I get for not buying a truck