air fuel ratio gauge
 

i bought a new o2 and put it in and reconnected the wire to the dark gray one. it has power because the gauge reads rich, but it wont move out of the rich side. it doesnt move at all and i cant figure it out.

Some O2 sensors won't work properly with a gauge installed. I would try double checking the connections, and see if that works. if it doesn't, disconnect the gauge or buy a new O2 sensor. If you use the gauge with an incompatible sensor, you risk sensor and ECM damage.

Take care,
-Chris