car is only running on cylinder 3and4 1 and 2 are not working... tried new plugs wires and dizzy, checked timing and i have good compression in all cylinders.. the injectors are good any help

 

make sure your firing order is correct. one easy way to see is just swap the #1 and #2 wires see if it still misses, check cam timing, check for spark to those cylinders, check for fuel injector signal, one wire will be positive at all times the other wire will flash a ground signal on and off. the wire that is the same color on all injectors is positive power to all. start there. and reply