1996 Mitsubishi Eclipse code 300 multiple misfire

Was driven down the road, car started boggin out. Made it home but couldn't give it much gas or would stall. Pulled a 300 code(multiple misfiring). Changed plugs, wires, coil(distributer), ignition switch, still wont run. Gettin gas out of relief valve. CEL blinked 1 time then 2 times then 5 times then 5 times again.