i changed a 88 civic 4door to mpfi and i did all the wiring right but when i turn the car on cylinder 1 i don't think is getting gas... so basicaly its running on three cylinders could this just be the injector?

 

Yes, it could be, but it also could be the wiring.

 

Can you move one injector from one cylinder to another to test that theory?

 

so how do you know what cyls are getting gas or not to begin with?

 

i have already moved the wiring but cylinder one still nothing
and it has spark i have already checked that also

 

could be the wiring but could be the injector doesnt work anymore.
by moving the wiring what do you mean? try what foxcow said take out two injectors and moved them around and see if it still wont work.. if so then you probably need a new injector.

 

pull the plug out and see if it smells like gas and looks wet. if not i would bet a bad wire somewhere. trie to find a injector test light that you can borrow.

 

or just put a screw driver agains it and put your ear to the handle.. think you should hear clicking noises .