Martin
That's really interesting information, I don't know what the spec of the stage 3 I have is however, I have asked the guy for it. You can see the kit I bought here:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123
Funnily enough the guy who sold it to me said it could be ignition. I have emailed him today so hopefully he will give me the spec in his reply.
KSA and Pete, thanks for your input and reply.
Martin Thanks again for your time.