there is also a fuel pump check valve thatis replaceable on the output side of your fuel pump, does the car exhibit similar difficult starting to a lesser degree if left for 3-4 hours and then restarted you may purchase this valev at your local dealer or through a bosch retailer . good luck not very difficult to do if you dont mind laying on your back and getting gasoline creeping up your arm to you your arm pits... just kidding be smart and be careful if you attempt to do this on your own without a lift and a fuel line pinch off tool.