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Old 04-20-2008
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02 sensors...

I need to change my 02 sensors out as I've just hit 90k miles and haven't changed them.

Can someone let me know how to do this?

Thanks!
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Old 04-21-2008
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i would like to know how to and this is the second 3.0 for me and both have had 02 sensors go bad... must be popular
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Old 04-21-2008
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*bump*
Anybody?
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Old 04-21-2008
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Unplug and unscrew them and plug in the replacements.

The Mustang guys say NTK is better than Bosch for replacements.

I think it's a 7/8" open end you need -- a good one with tight tolerances. They can be tough to get out. There's a special socket for that with a slit in the side that lets you get it over the cable and slide it down but I've never used one.

There's one sensor in each leg of the Y-pipe just below the exhaust manifolds. You can reach it through the front wheelwells with the wheel soff and the protector piece son the bottom off. That accounts for two.

The third one is not critical to your fuel ratio and can be left alone if it's working okay -- or you can replace it -- up to you. It's between the two big CAT's on the single exhaust pipe after the Y-pipe (on a 2002, on 2000 and previous it's after the two big CAT's).

The last o2 sensor just monitors catalytic efficiency with a broad range of acceptable values and that's why it's not critical. It doesn't correct your fuel ratio, it's just a catalyst monitor.
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Old 04-22-2008
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Quote:
Originally Posted by n3elz View Post
Unplug and unscrew them and plug in the replacements.

The Mustang guys say NTK is better than Bosch for replacements.

I think it's a 7/8" open end you need -- a good one with tight tolerances. They can be tough to get out. There's a special socket for that with a slit in the side that lets you get it over the cable and slide it down but I've never used one.

There's one sensor in each leg of the Y-pipe just below the exhaust manifolds. You can reach it through the front wheelwells with the wheel soff and the protector piece son the bottom off. That accounts for two.

The third one is not critical to your fuel ratio and can be left alone if it's working okay -- or you can replace it -- up to you. It's between the two big CAT's on the single exhaust pipe after the Y-pipe (on a 2002, on 2000 and previous it's after the two big CAT's).

The last o2 sensor just monitors catalytic efficiency with a broad range of acceptable values and that's why it's not critical. It doesn't correct your fuel ratio, it's just a catalyst monitor.

Thanks Griggs, I'm on it!
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Old 04-23-2008
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Just changed out my oxygen sensors and boy what a difference. Feels like a nice smooth ride now and doesn't bog out as much but I still feel it at times.

Damn these things were pricey....
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