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Possible Faulty Coils?

Old 07-24-2011, 11:32 PM
Junior Member
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Join Date: May 2011
Posts: 5
Angry Possible Faulty Coils?

A week ago when I started my 01 F4i it sounded like it blew a spark plug making it sound like a damn lawn mower. I ripped apart the bike put new ones in, fired it up and it still sounds the same. Could it be that one of the coils is faulty causing this? Should I gamble and just replace all of the coils just to be on the safe side?
Old 07-25-2011, 01:49 AM
nickp123's Avatar
Senior Member
Join Date: Aug 2010
Location: NJ
Posts: 806

well test each plug and see if theyre all getting spark. If they are i dont see any sense in replacing the coils. Try and find out what the problem is before you go wasting time and money replacing unnecessary parts. Run the engine for 5-10 minutes and spray some water on each header, see if any of them are still cold and youve dropped a cylinder. If everythings fine and it just sounds loud/like a lawnmower you could just have an exhaust leak and you may just need a new gasket somewhere. More details would be helpful.
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