Hello all, I own a 2006 VW Jetta TDI- BRM engine. It seems as though after 150k, she's not running too well. I have followed the routine scheduled maintenance to the tee. I've got an intermittent misfire on number 4 cylinder. While talking to a few of my car friends, they think it could be the EGR valve clogged or clogged intake. Reading your topic on camshaft problems, I am beginning to wonder if this is what it maybe? Is there a way to determine this problem without removing the valve cover and visually inspecting or should i just bite the bullet and pull it? The misfire seems to be prevalent when there is a load on the engine otherwise it runs fine at idle. I also get an excessive amount of exhaust "black smoke" out the tailpipe. If it is a problem with lifters and camshaft, what's to say my wife continues to drive it this way, how much more damage do you think will be done in addition to cam and lifter ware? Like some feed back from all of you