One thing it has been doing sins xmass it dose not like to start of the key when cold i have to play with throttle to get it to start and some time when i turn the key it will back fire . Iv had a look at the timing and its ok . When it starts it will cut out if i stop playing with the throttle as the revs try to go down to about 500 RPM . When its been running for about 1 or 2 min it will run on its own and as it warms up the revs go up to about 1000 RPM . Then you go for a drive and it drives 100% in all the gears and all the way upto about 20 psi then it start to play up . the monent it coths and bangs i go for a new gear and its back to a nice dive . I will ad i know the car has got to go to martin for a full set up but it would be nice to sort this problem befor it gose to martin as all it will do is push the bill up