mts Posted February 4, 2008 Report Share Posted February 4, 2008 ORIGINALLY POSTED on mazdaprotege.com by Rac3rX. How to cure Cel/Mil from removing cat with Non-Fouler First off Id like to say I got the steps for this process from justanotheradikt He was great in helping make sure I did everything right and made no mistakes along the way (Good thing he was there because I was lost) This will cure the Cel caused by removing the Catalytic converter, usually when you install headers. Total time required: 15-20 min. Tools and Parts required Tools: Adjustable wrench & vise grips or another adjustable wrench (you need 2) Drill with 1/2 inch drill bit Clamp if availible, (Vice Grips and a foot will work too, if you have no clamp) Parts required 2 Spark Plug Non-fouler adapters 18mm w/gasket (Napa Part 7302442) 2 come in a pack. Here is a Pic of them in the package. Step #1 Disconect the negative terminal on the battery, then Take ONE & only one of your 2 non-foulers and Drill out the Top end with the 1/2 inch drill bit untill it goes all the way through. You can eithor clamp the peice down to be drilled by hand, or do what I did & clamp some vice grips onto it, hold it down with your foot & drill away. You can also use a Drill press if you have access to one, but its easy to do it with a hand held drill. Once done it should compare to the un-drilled peice like so... Step #2 Attach it to the un-drilled peice making sure the Un-drilled peice screws On Top of the drilled peice & making sure there is a gasket on. It should look like so... Step #3 Unclip the o2 sensor clip & Disconect the o2 sensor (2nd o2 sensor for removal of Cat 1 with headers install) from the car using the adjustable wrench. IMPORTAND to unclip the o2 sensor first so that you can spin the wires while you unscrew it to insure you dont over twist the wires. Step #4 Screw the o2 sensor into the non-foulers making sure you have a gasket on using eithor 2 adjustable wrenches or 1 adj wrench and vice grips. It should look like so... Step #5 Reconect the o2 sensor to the car and plug it back in. It should look like so... Step #6 Reconect the negative battery cable, while we did the install the ECU was reset from us disconecting the negative battery terminal in Step #1. YOUR DONE!!!! The ECU should take arround 300km to adjust. ORIGINALLY POSTED on mazdaprotege.com by Rac3rX. Quote Link to comment Share on other sites More sharing options...
Frankzao Posted July 9, 2009 Report Share Posted July 9, 2009 What does the non-fouler do? Quote Link to comment Share on other sites More sharing options...
SteveSter Posted July 10, 2009 Report Share Posted July 10, 2009 It doesnt let all the exhaust pass by the o2 sensor and it reads less than its suppose to and cat efficiency codes dissapear. Quote Link to comment Share on other sites More sharing options...
Frankzao Posted July 10, 2009 Report Share Posted July 10, 2009 Wouldn't the mod be notice at inspection? Quote Link to comment Share on other sites More sharing options...
mts Posted July 10, 2009 Author Report Share Posted July 10, 2009 Only if the tech was actually paying attention. Quote Link to comment Share on other sites More sharing options...
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