well i asked this ? before with never a straight answer wth is a pintel ?? I took it off and cleaned the bottom and the spring loaded device but nothing was real dirty ?? What am I looking for on the tube ?? If you can give some instructions that would help.
If your still getting codes, and you have checked everything, you may need to just replace the EGR. It'* a simple set up, a tube from the exhaust manifold, a valve controlled by a solenoid, and another tube going in to your lower intake manifold. I have a whole EGR setup here if your interested.