Yep...I cleaned out my manifold with a product called Chem Tool B12. Best stuff out there at Autozone. Went through all the flaps the egr valve and cleaned off the sensor in the rubber hose. Reinstalled everthing and she runs great no more surging... ever. I believe the violent surgging problem ruined my trans, I was luckly my extend warrenty covered the coastly repair. I would not dirve a car for a long time with the surging problem since it can put a lot of stress on the trans and wear out the clutch disks.

I had intended to run the egr fresh air hose back to the airbox. I even had it set up once, worked fine, but figured why put a hole in the air box when it works fine with the small filter.

Again I wish a 98-99 Turbo user would attempt the mod, and post the results......