your going in the right direction,,i own a repair shop,,and this is exactly where i would began,,assuming that it has been kept in good running condition,,such as the occasional tune up,and oil changes,,these cars are easy to work on,,and when they get a starting problem,,it is usually an easy repair,,if i were you i would try the fuel filter first,,and see if the problem does go away,,if you have been lucky enough to get that many miles from a fuel pump,,you have done real good,,most pumps on the honda,s, give out at around 150.000 miles,,so you have done good,if you don't get it figured out,,maybe i can help later on,,but you are doing the right things to it,,i hope this help,s.