Quote Originally Posted by togenshi View Post
Take your intake manifold off and clean it and the intake ports. You have option to remove swirl valves as well. I must have gotten another 60NM of torque from cleaning all the soot inside mine. Its like a new car now. A good 4-5mm of carbon/oil around the intakes.

http://imgur.com/ScyecOg
This!!
When my intake was cleaned, the mechanic showed me the amount of shit in the box that was removed... Car definitely behaved different after that, it was more punchy!
I also had a 2009 CRD.