O2 Spacer or Mil eliminator???

hotstang · Mar 22, 2012

I am trying to find out if a set of O2 Spacers will help with my P0420 code or if I need Mil Eliminators..

I just got an 02 GT and am getting a code P0420. The previous owner made his own x pipe. The two front PreCats are still in place but he cut out the two rear main cats.

So does anyone have experience with the O2 Spacers?
http://www.ebay.com/sch/sis.html?_nkw=UNIVERSAL 02 SENSOR Oxygen Extension Adaptor spacer O2

Thanks

wmburns · Mar 23, 2012

The other name for these are anti-foulers. They are available from your local autoparts store.

The PCM programming is smarter in later MY cars. Did you know in late model cars (2003 or 2004+) that the PCM will command a misfire just to confirm that the misfire is seen by the O2 sensors? That's why some simple MIL's might not work on a late model car.

Check out this post for information on why removing one cat could reduce the service life of the remaining cat.

http://www.stangnet.com/mustang-forums/threads/removing-2-cats.854444/

Three50won · Mar 23, 2012

wmburns said:
The other name for these are anti-foulers. They are available from your local autoparts store.

The PCM programming is smarter in later MY cars. Did you know in late model cars (2003 or 2004+) that the PCM will command a misfire just to confirm that the misfire is seen by the O2 sensors? That's why some simple MIL's might not work on a late model car.

Check out this post for information on why removing one cat could reduce the service life of the remaining cat.

http://www.stangnet.com/mustang-forums/threads/removing-2-cats.854444/

Interesting...

hotstang · Mar 23, 2012

wmburns said:
The other name for these are anti-foulers. They are available from your local autoparts store.

The PCM programming is smarter in later MY cars. Did you know in late model cars (2003 or 2004+) that the PCM will command a misfire just to confirm that the misfire is seen by the O2 sensors? That's why some simple MIL's might not work on a late model car.

Check out this post for information on why removing one cat could reduce the service life of the remaining cat.

http://www.stangnet.com/mustang-forums/threads/removing-2-cats.854444/

Thanks for the reply. I will eventually get a good high flow Xpipe with cats but just need to get thru emisions so I can transfer the title. They do the ODBII scan and dont sniff on newer cars so I should be good if I can get the light out.

So do you think the Anti-foulers or the MIL eliminator route would work better?

Thanks

O2 Spacer or Mil eliminator???

hotstang

wmburns

Three50won

hotstang

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