got a 07 ss/sc been having problems with sputering an eng light been 2 dealers 12 times thay told me it is injectors ran good 4 about 100 miles now its sputering agin an pulled code 4 cylinder mis the dealer is saying its the way im driving it say i ride gear too long so now i drive like old person stil come on can any 1 help befor thay give bull agin some hints