I have a 2010 Dodge Ram 1500 with a 4.7L Flex Fuel engine. I have been having a problem with miss fire on 7. It seems to ruin coils on 7. I just had coil replaced $370, and while the check engine light is not on, it idles rough when in gear. I was told by the mechanic maybe a bent valve? HELP! please......

 

If it's munching up coils, that's another problem. There was a thread around here recently about another member having that problem, I just don't recall what his fix was.