Hi I,m have some misfire problems myself,it started wiith after driving it hard when I took my foot off the gas and then reapplied my foot it was sputtering for a few seconds and then just seamed to clear until I done the same again,but over time it has now started to sputtering mid rev range,its like its got fuel starvation but its electrical or coils.its only done 65,000 kms. what you have said makes sence and I will look at the wiring tomorrow and you say its at the back off the head? what am I looking for ie loom damage or some thing like that? thanks Stu Mac ps what where your symtoms to make you look bud?