Fuel injector problem?

Hello i have a nissan 240sx 89 i just got it out of the shop like 2 days ago and now i have a problem i thought it was a fuel injector so i went to the auto store and brought a new 1 turns out im having the same problem as before so then i changed the orings and its still shootin out fuel what do i do please helpFuel injector problem?Well first of all, Why did you have it at the mechanics, they might have forgot to tighten/put on something as well, it is a pretty popular thing these days lol. but to better explain this issue try to sound out sounds it makes or vibrations, rhythms, etc... it helps us try to help you ALOT better. For example what makes you think it is a fuel injector?(Fuel injectors are pretty rare to go bad, ive had over 40 cars and never had 1 issue with them car mileages from 20k-278k miles on the motors). Does it putter when your driving? does it stall at stop signs? Does it sound like its gasping for air when you give it gas? etc. i hope this helped reply back if you can and further explain what you problem is if possible. Good Luck :P
Fuel injector problem?
try seeing if the fuel rail is bad or did you replace all the o rings is the injector installed all the way did you leave a old o ring in the rail before you installed the new one come on you can't see where it is leaking from and remember to do it out side and don't use a drop light near the fuel a hot bulb a gas don't mix