Has anyone here ever changed one? I bought one from a reputable place and it only had 2 short wires coming from it. The original (still installed in the header pipe) has a shielded cable coming from it. I would have thought that the hardest part would be to 'unscrew' the old rusted one. Anybody here have some hands on experience.
4dr,4wd,FI engine. Thanks"Buffalo" wrote in news:X6adnfqz-ozn037bnZ2dnUVZ snipped-for-privacy@comcast.com:
Yes
O2 sensors usually come in two flavours, 4 wire and 2 wire. The four wire type has a built in heater. You need to have the correct one for your car. Sounds like you got a generic O2 sensor, the intention being that you splice the wires from the new sensors onto the old wire harness. I did this on my sons Honda, and it worked fine. The shield on the existing cable is grounded. The sensor voltage is less than 1 volt, and usually swings between .1 and .9 volts, hence the shield to prevent interferance. The O2 sensor should have come with a splicing diagram.
As for removing the old one, you might be able to get a 22 mm ring spanner onto it after threading the wires and connector through the spanner's ring. An open-ended spanner might also have enough grip, if there's access to swing it.
If you're going to use a normal type of socket, you'll need to commit yourself in advance by cutting the wires to get the socket onto the sensor. I use a special socket with a cut-out in the side to accommodate the wire without cutting it, like these:
John
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