I have a 1989 U12 2.4l Nissan Pintara. It started running really rough one day and when I got home the exhaust manifold was glowing red hot. I changed the catalytic converter and it still is running ...
My BMW E36 M41 engine seems to have a dark dust in the small tube that goes out from the EGR valve. (the other tube contains a sort of dark liquid...) Is it advised to cleanup that dark matter ...