ive got a 1990 plymoth colt with the 1.5 mitsubishi motor drining one day it started to run real rough and couldnt get it up to speed(45+). so i started checking things found that i had 2 dead cylinders so i took the head off sent it in to be redone.got it back put everything back together car still does same thing. checked my timing and everything seems ok i need some suggestions please

ive got a 1990 plymoth colt with the 1.5 mitsubishi motor...i need some suggestions pleasePost in the correct forum and you should get some better help.