Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
My BMW runs really rough and shakes the hole car and it misfires on 3and 6 and I replaced the spark plugs and ingintions coils and it still does the samething but know I don't know what else could it be
As above we need the year and model and also is the misfire cylinder numbers reported by scantool or are they from a cylinder drop test ? and is the misfire present at idle and smoothes our or more evident when giving it some throttle under load ?
In any event I would want to do a compression test.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
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