I just finished rebuilding the engine (new rods/pistons). Everything is back in the car and now it wont start (cranks though). I did a compression test and everything was 160-165. Strange enough, there's no injector pulse on cylinder 3 and 4. I removed the plugs after the initial start. 1 and 2 were covered with fuel and the others were still brand new. I've tested for spark already. So what should i check next?

 

Swap injectors around and see if its electrical or if youve got 2 dead babies