sorry using my mates logins as mine weren't allow me to post with it. I have a series 2 gtst running 12 pound, with front mount, and exhaust, pod etc nothing fancy. It's put out 206 rwkw on a dyno - not a gts4 - sorry bout the mix up. i'll try these things and see how i go. that point you made about an aftermarket ecu being there makes sense also. how can i check this out to see if it is an aftermarket ecu? if it is, should i change it back to a stock one to allow the car to run at factory setting or would the factory ecu setting not comply with the aftermarket enahncements that have been done? p.s i've only owned the car for 4 days and haven't owned a turbo before hence my lack of knowledge