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Thread: How to cure Cel/Mil from removing cat with Non-Fouler

  1. #331
    Zoom Zoom CiviCity's Avatar

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    Double post...
    Last edited by CiviCity; 12-29-2012 at 09:00 PM.

  2. #332
    Zoom Zoom CiviCity's Avatar

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    Could someone confirm if this would work or not..?

    http://www.ebay.com/itm/271018193800?redirect=mobile

  3. #333
    Supercharged CDN P5 bikingpro5's Avatar

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    Quote Originally Posted by CiviCity View Post
    Could someone confirm if this would work or not..?

    http://www.ebay.com/itm/271018193800?redirect=mobile
    those will work, but go into a parts store and buy M18 spark plug non fouler for cheaper and you wont have to wait. Napa, Canadian tire have them.

  4. #334
    Registered Member whatusername's Avatar

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    dammit i just order another 02 sensor cuz of the CEL . If i would have known about this when i installed my header last week i could have saved 100 bucks..Oh well i guess i/ll use the new 02 when it gets here and do it then

  5. #335
    Registered Member tweety2300's Avatar

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    Or give it to me lol

  6. #336
    Registered Member tweety2300's Avatar

    2001 mazda protege mp3

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    Has anyone had issues with o2 sensors runing these? I've been through 3 in the past few weeks, I'm waiting for auto zone to reject my warranty.

  7. #337
    Registered Member nipsmsp's Avatar

    2003 mazdaspeed protege

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    ive just tried this idea and did not work for me. i have the corksport exhaust with no cat so i thought id try to get rid of the cel. did exactly what the tread said and i screwed it into the bung on the stock jpipe and did not work for me. any ideas what else i could do??

  8. #338
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    On 2 is bank 2......side of motor with no.2 piston

  9. #339
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    Here's another point to make.Aren't these fancy computers supposed to be able to be reprogrammed for engine changes,like exhaust flow,air/fuel ratios,etc......

  10. #340
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    I just completed this and sofar no CEL! Thanks for the instructions.


  11. #341
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    Update: The CEL came on the next morning when immediately upon starting my car. I'm not sure why it's not working, I did everything correct. But it sounds like the things to check are, 1) Is there a exhaust leak 2) Was the hole drilled big enough. It did feel like I had to really cram the sensor in the non-fouler to get the threads to connect. Could this be the problem? Not enough room in the non-fouler? Thanks.

  12. #342
    Registered Member buttthrax's Avatar

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    Quote Originally Posted by PortlandChris View Post
    Update: The CEL came on the next morning when immediately upon starting my car. I'm not sure why it's not working, I did everything correct. But it sounds like the things to check are, 1) Is there a exhaust leak 2) Was the hole drilled big enough. It did feel like I had to really cram the sensor in the non-fouler to get the threads to connect. Could this be the problem? Not enough room in the non-fouler? Thanks.
    Check what the code is. This fix works for P0421 caused by failure of the precat but you may have something else going on.

    Always make sure your ignition coils and spark plugs are good. Running with bad coils or plugs will give you a misfire code which is associated with this problem.

  13. #343
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    Quote Originally Posted by buttthrax View Post
    Check what the code is. This fix works for P0421 caused by failure of the precat but you may have something else going on.

    Always make sure your ignition coils and spark plugs are good. Running with bad coils or plugs will give you a misfire code which is associated with this problem.
    I ran the codes and I'm now getting P0140 and P0037, it was P0421 before I installed the non-fouler. So now it looks like the tight fitting non-fouler might causing an error or there's a wiring problem.

  14. #344
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    I done this about a year ago.....and....the CEL is back.Bank 1 lean.Anybody?

  15. #345
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    Sorry to resurrect an old post, but, the pictures aren't working for me. from the 02 sensor to the bung does it go, o2 sensor w/ original washer, big hole, gasket, little hole gasket bung?
    Last edited by jhines142; 03-01-2018 at 12:46 PM.

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