I Have a 03 cummins which keep's leaking fuel near #5 injector line I replaced #4 and #5 line thinking it was one of them washed it off really good and it is still leaking fuel I can't see fuel leaking with engine running and even at a high rpm but fuel keep's coming up right where the rear engine lift point is by #5 any one have any tips?

 

How long before it gets wet? Try a bright light at night. High pressure is hard to see probably only at full throttle when pressure is high Power brake it and see if you can spot it. Since you replaced the lines it may be the connector tube or fuel manifold

 

I found it and fixed was #2 crossover tube