91 legacy injector issue

[kdrozdov]

so I have a 91 legacy that I just got it was running a little ruff and the mechanic said it needed a new injector, he replaced it and seemed to fix the issue but two week later its back to sputtering at idle. I am out of town so I decided to replace the injector that seemed to be the problem but i didnt know i needed to release the pressure on the fuel rail first so I got alot of fuel in that cylinder in the prosses. I didnt think it was a big deal untill i tried to restart the car it backfired on first crank and know does nothing but click when i turn the key. any ideas would be helpfull and most appreciated as i am working out of town and cant get it to the mechanic.