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Yes .....

 
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Not true. A Random Tech, is a true high flow cat.

 
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yea well its still "high flow" which is more exhaust coming through anyway. but yea ill be gettin a real high flow cat.

 
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Not true, not true... i guess after rethinking it, it MAY need one but prolly wont i must have either miss read your post or was on crack momentarily

 
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It's ok. I know YOU know better. Just don't want bad info to be spread around. There is enough on here as it is sometimes.

 
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All right guys last night driving home my CEL light came on. I think my mil eliminator just went bad again, i've been making my own and they've been lasting about 6 months to a year. So I decided to try this next time the light came on. So im going to tonight, I just want to know. Has this stopped working for anyone or is there still no CEL codes from it at all?? ANyone have fitment issues with this?

 
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to this day have NEVER had a CEL for O2 with this installed

 
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Fantastic, Thanks bud.

 
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I put one in my g/f's car probably about a year ago, when i installed her test pipe, no CEL still. Its so easy to do also, this is an awesome mod.

 
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Well good, I have made two of my own mil Eliminators, after buying my first one. I have to make a new one and am getting tired of it. Glad to know this will get rid of the problem permanently.

 
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same problem with me also keeps giving me a problem ... it makes my rpms go a bit higher also ... a way to adjust around this ... i have an lx with an ex conversion

 
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ok so i install this on the second hole of my megan cat and i drill out the defouler correct?

then install it.

and just the o2 sensor goes in the first hole?

 
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you are correct , you leave the first o2 sensor alone. this is all done at the second o2 sensor

 
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wow i was way off!

thank you sir!!!

 
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did any of you have to make the wiring for the first O2 sensor longer when ugrading to headers?

 
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Mine is on a boosted setup, with a custom down pipe. so i mounted the O2 were it was easy to reach with the wires. I've got no knowledge on N/A setups. But you may want to take the wires out of the loom and see if you can make them reach?

 
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i did this with one long fouler so i didnt have to drill it out, its the same size of the two put together , has anyone else done this?

 
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Does anyone know with certainty that this will work on a 2004 Civic Hybrid? The dealer says the cat is bad but I'm not convinced. I'm hoping to do this and get rid of the CEL on my wife's car for good. Also, the Hybrid supposedly has 3 02 sensors. Would this go on the 2nd or 3rd or both?

 
Rep Power: 811

you need to figure out where the sensors are. usually the first sensor is for a/f ratio and should not be touched because it affects how the car runs. the other one(s) are prolly inside the cat and only measure emissions. i have heard alot of older 03-05 hybrids having the cat go out so its prolly true, but the o2 sim is a cheap way out. just make sure the cat isnt clogged or you will have bigger problems with the engine.

 
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Well, it's been a week and so far so good. FYI, there are 3 sensors on the 04 Civic Hybrid. The 3rd sensor (furthest away from engine) is the one that needs this mod.

 
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So after reading this I was wondering something about this topic. How would adding this on to a perfectly running 05 civic change the way it runs. you said it increase's the AFR slightly so leaning it out more correct? Could this be done on a normal D17 with no real issues like the chance of pinging or missing due to increased temps? would this allow for better MPG?

 
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all it does is show the computer that there is a measureable difference between the 2 O2 sensors. In other words making the computer think that the cat is there and doing its job. I still to this day have never had a check engine light for this. It works flawlessley!

 
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the defouler doesn't work rite on all setups because you cant get the o2 sensor far enough away from the flow of exhaust do to lack of room just buy a angled megan simulator and be done with it.

 
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Hello,
First post here.
I'm new to Hondas and the daughters 2003 is throwing the P0420. Reading this thread it's not clear to me if this non fouler mod will work on a completely stock exhaust. Everyone seems to be running altered systems in some respect.
Cheers

 
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Hey so i have the stuff to do this, my civic is a 2002 dx, header installed great. Jw do i add these to the top o2 sensor or the bottom one? Or both? To avoid the code and to maximize fuel consumption.

 
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Bottom one, just one should do it to get rid of the code

 
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Ok cool thank you. At the moment i have it plugged off as i broke the wires so had to order a new o2 sensor. The top one is just screwed in normally. Car runs fine just want to get rid of the check engine light and make sure my gas mileage is ok as my manifold was rotten and the header was cheaper than a new manifold.

Thanks

 
Rep Power: 327

As he said, install into the lowest, or furthest downstream O2 sensor

 
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Will this work on a 2015 chevy 5.3 1500 I want to get cats cut off but dont want it to screw up an not work an have to wait for a programmer, does any one know a good programmer to get to disable the o2 sensors if I desire to get one ???

 
Rep Power: 125

Maybe ask a Chevy forum? This is a civic forum…