my truck misfires once in awhile between 35 and 45 i know i should get the plug changed but im worried that its going to kill my pocket. it has the lovely new plugs in it that i didnt think about before buying. does anyone know how much it runs to get them done. the code says misfire on star up bank 1 im hoping its a coil any thoughts on how to check this it only happens once in awhile but i know its not a good thing and needs fixed asap