How can I determine if it is just an injector problem. I do know that all the overflow tubes from the injectors all sweat and leak fuel badly. I am also still running 2 year old diesel but I really dont think those things would cause the engine to sound like it was ticking and knocking.

I cant really seem to get much more power after I hit 55 mph. It kind of feels like it stumbles at that point and wont increase in speed. After the engine warms up for a few minutes the ticking getts louder and it is embarassing to drive at that point. And a little scary