K guys when I put my new motor in I put 191 delivery valves in and 4kgs and overflow valve and mack plug. Well 4 days after runnin it it started runnin rough and I cracked all lines and #3 cylinder is completely dead. Well I have compression checked all is well. I checked timing. I swapped injectors. Last I pulled the lines off the pump and #3 is barely even leaking fuel. What could cause this. Is it possible for a delivery valve to mess up. All help appreciated

 

Swap aroma some dv's and see if the dead spot is still on #3.
It could be internal in the pump further than a DV