There is a check engine light and I forget what the code is but it had to with the egr failing. My mechanic replaced the vsv valve and modulator but only "cleaned the EGR". I already bought the new valve but its so rusted that I can't unscrew it from the pipe at the base. I think I should replace the whole pipe as well since I cannot budge the damn egr off of it. Anyone know the easiest way to remove the pipe/tube from the manifold?