DODGE SPARK PLUG REPLACE/REMOVE

Hi I Have A 2000 Dodge Neon Highline It Has 110000 Miles On It And I Am Having Misfire Problems I Replaced The Coil With A Msd Ignition One...

Engine Has A Rough Idle For A Minute After Starting And The Oil Smells Like Gas. I’ve Changed The Spark Plugs And Wires And Am Wondering....