Could be an intake manifold leak, injector seal leak etc.
I would check the intake and injector gaskets, look for cracks, check intake manifold bolts for looseness.
The EGR will function at steady speed and meters a small amount of exhaust gases into intake to reduce NOx emmissions.
I would remove EGR and clean it up, replace gasket.
What code are you getting?
Sunday, November 8th, 2009 AT 8:14 AM