I disabled my EGR valve by unplugging the vacuum line and plugging it. I've driven with it on and off for long periods for quite some time now.
With it off, it seems the car feels a bit more responsive and slightly lighter on fuel when start stop around town. When on the highway the car feels more responsive (ever so slightly) and is slightly lighter on fuel with the EGR on.
With the EGR off you can hear what sounds like the pressure converter buzzing as pressure is lost when you switch off the engine. EGR back on and everything sounds fine.
I would say that the car is designed to work with the EGR, so leave it on. The difference isn't enough. If you want it off, remove the DPF, physically blank the EGR on the manifold and turn it off in software.
With it off, it seems the car feels a bit more responsive and slightly lighter on fuel when start stop around town. When on the highway the car feels more responsive (ever so slightly) and is slightly lighter on fuel with the EGR on.
With the EGR off you can hear what sounds like the pressure converter buzzing as pressure is lost when you switch off the engine. EGR back on and everything sounds fine.
I would say that the car is designed to work with the EGR, so leave it on. The difference isn't enough. If you want it off, remove the DPF, physically blank the EGR on the manifold and turn it off in software.