i have a 1990 mustang 2.3 efi it was running rough so i tuned it up drove around block then it died ended up putting a new fuel pump on it then when i got it restarted it ran like crap. and its hard to start if and when it starts. when it does start u have to hold your foot on the floor for a minute now it sounds different like its stopped up or something. can this be the injectors or dist cap or cat converter any ony have ideas thanks let me know asap

 

change the fuel filter thats cheap and needs to be done any way if that doesn't help it could be a stoped up injector. running out of gass is hard on a old car.