Vehicle is my wifes car. Vehicle lost acceleration during rapid acceleration attempts (freeway on-ramps, etc.). Threw engine light with P0087 code (Low fuel rail pressure). Brought to local dealer to diagnose and was told the diverter valve failed, which caused the water pump to leak and then caused transmission to overheat. The total quote for repairs was over $8,900. None of this made sense. Did a static pressure test for over 45 minutes on coolant system and never lost pressure. That told me the water pump wasnt leaking. Decided to replace high pressure fuel pump and upon replacing found that the spring on the pump had wore down and punched a hole in the tappet that gs to the camshaft. Replaced high pressure pump, tappet, and fuel manifold from the pump. Pump ($245), fuel manifold ($20), tappet ($10). When purchasing the tappet from the local ford dealer parts store, the employee stated that they have people come in all the time for these tappets. After replacing the components, the car runs fine with no issues. I returned to dealer with components and they failed to acknowledge the mid diagnoses of the vehicle and asked that I bring it back in to verify the problem was fixed before refunding the diagnostic fee ($195). Initially I agreed, but after careful consideration I decided not to due to concerns from the initial diagnoses. See attached pictures. Pictures are of new components and old components.