Hey guys I finally got back around to this and tried pressing on the EGR. The whole problem has gotten worse now in the sense of it wants to stumble at idle in all gears.
With it on and stumbling, I depressed the EGR and the idle did get immediately worse. However - after I let it go, no more stumble. After a few minutes of a perfect idle, had someone put it in drive and hold the brake and the stumble started again, but same thing - depressed and released the EGR and no more stumble, not even back in park. So we definitely have something, just not sure how to interpret it.
With it on and stumbling, I depressed the EGR and the idle did get immediately worse. However - after I let it go, no more stumble. After a few minutes of a perfect idle, had someone put it in drive and hold the brake and the stumble started again, but same thing - depressed and released the EGR and no more stumble, not even back in park. So we definitely have something, just not sure how to interpret it.