 Just make sure there are no vacuum leaks elsewhere. Leave the brake booster disconnected. All right. And then last, look around in the area of the O2 sensor. Any exhaust leaks, any exhaust leaks will skew that O2 and will contribute to a lean code. Do those things. Call me back. Until the next time, I'm Ron Ananian, The Car Doctor. Good mechanics aren't expensive. They're priceless. See ya.