Ideas on what's causing my click/tick/rattle noise?

The fuel pump arm that does not return all the way to the eccentric, will go Tick, Tick, Tick all the way through the engine. Even hearing it on the interior of the car.

Take the fuel pump off. Rattle the arm. If you can feel and hear looseness replace it with new. The pump arm/lever should be tight in there. Have had brand new ones that were loose, not a good sound.