I've had the car for years, have done nothing to it, except cat less exhaust. o2 delete not performed so I fouled it with an extension. Poor man delete I guess. Well the valve cover was a source of a leak so I replaced the seal and all that. ever since I get high pressure fuel rail inappropriately high. P12A2 code. So naturally I think I need to replace the sensor. However everyone says it's the pump. Should I just do the sensor and see what happens. I mean it was fine but now almost every time I drive it, it will idle rough throw misfires and shut off. Restarts fine drives fine then shuts off again. Any help will be most appreciated. Thanks and God bless