it should suffice just fine..fuel pumps do go out with stress.. depending on if you had a fuel presure riser/regulator..it could have stressed the pump..age of it..or milage possibly... one of my old accords did this very same thing. i could never figure out what it was though.. have you chnaged your fuel filter recently?
the reason i say its fine is, an h22 swap me and my friend did..we left the factory dx fuel pump and the car ran fine and never had any problems.