Thats great, my co2 number was at 8 so ive increased it to 15 but it hasnt seemed to have made a huge ammount of difference. When driving <30mph and come off the throttle there is a big jerk when rolling the power back on.
There is no slack in the chain, it is seriously annoying when filtering!

Its an 04 plate. Could the ecu have anything to do with it?

Cheers!

Dave