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Hi members. This site is new to me but seems very interesting. I have been having mechanical problems with my 2004 325 xi. I purchased new and currently have 85000+ miles. For the past 5 months I have been having an intermittent mis-firing problem. I have changed the fuel filter, plugs twice, put in a set of hi performance coils, used Lucas fuel injection cleaner 3 times, have had 4 scans done. The scans do not show a fault code, but only shows the history of which cylinders are misfiring. The history shows no consistent pattern of misfires. All cylinders misfire at different times. I could drive for 1 day 2 days 10 days with no problems, then the service engine light comes on and it starts misfiring. It could be very minor to severe back to minor then levels itself out and the check engine light goes out. It may misfire for a few miles, or a few days, it may run smooth for a few miles or a few days or a week or more. Anyone have any advice. Appreciate any help.

Thanks KT
 

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