Injector issues...Now blowing white smoke????

[chrismo240sx]

hey guys my car has been hesitating a lot lately when i shift through the gears or if i just step on the gas pedal, it hesitates then goes....so i decided to change my injectors.

Please note the car ran fine before i changed anything.

I only changed 3 of the 4 injectors bc i cant get one of the screws off of the last injector. So after replacing 3 of them, i plugged the sensors back on, started the car up and it isnt running on all 4 cylinders.

AND now i have have white smoke coming from the exhaust and it smells like fuel!!!

What should i check/do?

[MastaYu]

^ Check your timing

[chrismo240sx]

but i didnt do anything to the timing? why would that change?