I bought a 1991 accord lx with 256k miles changed the water pump , spark plug and wires . When i go turn on car the car starts off normal it idles past 1200 rpm and then the rpms just drop slowly and it starts to bogg and die. Also when it starts to bogg down it throws "sport" mode flashed for like a second or two. Im guessing maybe it could be the , fuel pump, main relay, or the fuel filter ? Any help will be appreciated .