View Full Version : 97 M2 plugs fouling

buell fun
07-09-2010, 09:30 AM
plugs foul when a clean filter is on,take the filter off and it runs great with no fouled plugs!I run 97 octane .Thanks for any advice

07-12-2010, 09:40 PM
Are you speaking of the Air filter, or a fuel filter?