My 2012 ram misfire
My ram misfire when I start it & when I'm going I'm
driving up any hill I shift to 6 gear sometime I shift
down to 4 gear, I put new spark plugs &change # 5
coil. It's still doing it I took off the spark plugs & #5
and # 4 had some oil on the plugs I clean them
them put them back on ,it's still keep on missing
can you advise me what I can do next