So my wagon has fail smog twice so far. I have replace plugs, fuel filter, air filter, cap & rotor, pcv, checked fuel pressure regulator. Except O2 sensor. O2 sensor looks like it had been replace before. I notice that when O2 sensor is unplug it runs a little leaner and when i plug it in it starts to get in the rich side. I having a problem trying to reach the O2 sensor with the standard O2 socket. The heat shields on the turbo and cat make it difficult. The service manual calls out for a special socket for the sensor which i assume it doesnt exist anymore. Any suggestions...