89 dodge power ram 5.9 (long story)

My dad's pickup did that too. The IAC is working and I havent checked for pressure yet but I think that the injector has something to do with it. I was wrong about them interchanging, it turns out that the caps dont switch sides but I think I will switch the injectors.
I dont think that an electrical problem would cause one not to work so if the same injector doesn't work I will check its connection and test the resistance.