Hello friends, just finished a mani swap and EGR system delete. Car ran amazingly well first two days, no noticeable difference other than the hard shutdown due to lack of anti-shudder valve. Today (car was parked on an incline with nose facing down the slope over night) I started the car and it ran like boo boo: stumbling, chugging rough as all get out. I shut it down, restarted, same deal, revved it a couple times, shut it down, restarted- back to normal and ran like a top. My vcds cable is with a friend so I couldn't scan it. Any similar occurrences from other PD owners? Up until this morning the car ran better than ever.