I've been told by people who have followed behind my cav that it smells like it's running rich. I know there is no way of adjusting the mixture because it's all done electronicly. The cars been fitted with a chargecooler and I was told the heads been polished. I don't know where to start looking for a problem, so if anyones got any ideas it would be greatly appreciated.
I'm also getting oil out of the dump valve on the car. Is this normal, or is it another cause for concern.