Roshan Imaduwa

hi, my car Nissan fb15 2000 model having starting problem time to time, some time its engine cranking but not starting, that time i realize when ignition switch on initially fuel pump not working to initial start up this fault is intermittent i gave direct power supply from fuse bord to the fuel pump for couple of second to run the pump for initial start up then start its starting, any body having any idea about it. is it problem with ECM, thanks very much.