OK - Dont try this without learning how first! It goes something like this though: 1. Remove O2 sensors(careful they can break off in the pipe) 2. put them in a vice and heat them up with a torch. 3. use a wire brush (drill mounted) and make em shine. Put em back and they may work now.
I realy would not use any kind of oil on the O2 sensors. Oil is why they need cleaned in the first place. I know some solvents can mess them up. All you want is clean bare metal on the O2 sensor.
Steve
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