I have just had t28 turbos fitted, i went to pick the car up and on idle it sounds and runs really really lumpy! like an american V8 muscle car! ive checked plugs and coils, looked for breathers etc, any other ideas? when its going along it goes quite well bet still not quite right and if i rev it gently on the spot its all burbbly, also used half a tank of petrol to 50 miles!!! smells like pure petrol out of the exhaust, its had other mods but fitted before turbos and no problems before, front mount, dump valves etc, nothing major. any help :confused: