I have a 1999 Dodge Dakota Sport 3.9 V6. I had a head crack, so I replaced both sides all new gaskets. After putting everything back together it all seems fine but when I go to drive or accelerate it has no power. I have figured out that my number 5 cylinder is not firing. I know there is spark and there is gas in the fuel rail. What can cause this and how can I fix it

 

Got injector pulse? How about compression?

Try swaping the injectors on 3 and 5. See if the miss moves.