I did not use the butt connectors provided, but instead soldered the wire on with double shrink tubing over it. I did this because the O2 sensor only sends a maximum of a 1 volt self-generated signal, and I believe that the soldered connection doesn't have as much resistance as the butt connectors, and is less likely to corrode, which would provide a poor signal to the computer. I then routed the wire under a heat shield to protect the plug in, and then ran the wire along the fram
one note to make....you need to use butt connectors on the O2 wires. soldering will cause the signals to be biased. the way an o2 sensor works is it actually uses the air passing through the wires to get its signal to and from the pcm. soldering inhibits this. hope that makes sense, tried to simplify it.
