For well over a year my 04 XR6T has had occasional misfiring and power loss "fluttering" when accelerating hard ... annoying part is that its totally unpredictable , most days it does not do it , and those "good" days it has have ALWAYS been when ive dropped it off to a performance garage to get it checked ! (damn thing) , usually involving me catching POOblic transport home and no car for days. Finally had enough and today when it was misfiring, I took it to DYnomotive and they told me it needs a set of 6 new coils , they said it was an obvious fix, (had all spark plugs changed last week by them) After all this time and headache I cant believe out of all the other people who looked at it, nobody even sugguested it might be the coils. I bought the coils today from ebay http://www.ebay.com.au/itm/170742879770?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 , way cheaper than bursons and apparantly better quality.