The Greddy turbo kits are designed to run rich to prevent detonation. Your O2 sensor should be black. White is bad but black is good. Any form of moisture on the sensor will show you something is wrong. You shouldn't of had to replace the O2 sensor at all. Don't always count on what your air fuel guage reads. Especially with the greddy kit, most the time if you're boosting you'll be in teh rich area. Try to get the install manual. It will solve most of your problems.
