my truck is miss firing on 5,6,7,8 they shop that told me that said it had more codes but wouldnt tell me. i replaced all plugs and coils at 90k. i have 150k on it now should they need replaced again???before they went out one at atime but this time they all went out at once. could it be something else that controls that side of the engine???? i cant drive it to a store to get the all the codes read cause it runs too rough.need help or i have to tow truck to ford