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Discussion Starter · #1 ·
i have a 2003 ram 360 gas motor. in the past i have had problems with missfiring and finally fixed it with dealer tune-up. after 2 years and 20,000 miles im back to same problem. so i went to local garage and they changed plugs and fixed it .three months later same thing ? my question is are the plugs he put in ok? should i put a better plug in and if so what plug? it has champion RC12LC4 in it now. thanks
 
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