I recently got my plugs changed on my 2003 SLS now the first day it drove fine but the next day it trew a hstory code at me it being p0300 which is engine misfire so can anybody help me figure out my problem when i turn it on it turns on great but then it shakes. i noticed that the coil in the coil pack was twisted so the guy tried to re coil it as best as he could.