I just got my Vafc2 in today and the car is running much better. My original thread where I posted how to install a vafc2 expired but all of your advice allowed me to do the install. Not nearly as tricky as it seemed. appreciate your help, and for the help with my o2 sensor woe's. Now does anyone know how deep you can tune with just a autometer a/f ratio gauge, or do a really need a wide band and a dyno. I got most of the stumble and super rich stink out of the exhaust, but how nut can i go with just my gauge. thanks again.