Confused with #1 cyliner misfire
 

I replaced the ip and it wouldnt fire cylinder 1. So i did a kill test and 1 wont fire but all others will. It has white smoke out the back. I compared #1 and #2 compression. Both 1 and 2 had 475psi. So i changed injectors. I put a new one in #3 and put the one from three in 1. 3 still fires 1 does not. I am getting fuel spraying on kill test. Sent ip back they said they bench tested and it came back good. Installed it and still no fire in #1 cylinder.
Thanks
01 ram 3500 HO 6spd

Check number one crossover tube and feed line pressure test as well if you have fuel leak