What would be some drivability issues with an EGR valve that is acting up. The valve in question is an electronic egr valve.
You really need to find a competent mechanic. (sometimes easier said than done). I have worked on cars for over 20 years and have NEVER seen a vacuum leak cause this kind of erratic behavior. If the codes will not reset, either the mech. doesn't know what he's doing or you have major computer problems. It may need to be replaced. The computers in vehicles are very reliable but not perfect. From what information you have given it seems that is the case. Before you go that route there are several sensors on this motor that could cause this. crank position, throttle position, mass air flow, etc. EGR would not cause this either. It have also seen coils breaking down cause this. This will get worse the longer the motor runs. (heat makes it worse). If you are not one to work on your own car I would start going to some differnt shops. Some times small shops seem to know more about troubleshooting than the dealerships.
the egr valve can make the vehicle stall it can make it load up with fuel and make the engine miss fire
i have a egr valve,the same as you,but mine is leaking vacuum.i got 2 new gaskets,but the weather isnt on my side.your trouble sounds like my trouble,and i was told by a mech.,that its the electronic egr valve.
EGR - Exhaust Gas Recirculation The EGR opens controls a valve that connects your exhaust manifold to your intake manifold. The EGR valve reintroduces engine exhaust back into the cylinders to reduce combustion efficiency during high rpms. This is to protect the engine and keep it from overheating. If you EGR is acting up and opening on low rpms then the car will spew out smoke due to unburned fuel and suffer from loss of power.
