I'm new here I have a 2000 Mitsubishi Montero sport 3.5l and it's throwing a p0300 code with no spark on #3n#6 cylinders please help I got new plugs in it I got new tying belt new water pump and spark plugs and it just started and it's really running rough could use some help

 

don't worry ,same with me ,did all that also ...same result...how sad