cat defouler question

[bennett1]

I was wondering if it is possible to pass henry county emissions with a defouler in the cat. I am looking into getting an ep3, but I want to be sure of this before buying the car and buying a new cat if it is unnecessary. The cel the car is throwing is p0420. Thank you in advance for any input.

[98blackcivic]

^^probably..
i hope my situation doesnt have to resort to this.
im gonna try to find a wrecked accord and see if i can just use the cat offa that....
i suggest that would be ur best bet too..

[CDangerfield]

I've done it. You are referring to using a sparkplug nonfouler before the o2 sensor, correct? It puts more space between the o2 sensor and the airstream to reduce the amount of air/carbon that the sensor reads.

[l Gizzy l]

^^^correct, parts stores sell them.

[ezone]

They work have two in my srt8

[bennett1]

Thank you for the responses. I also found a video on you tube that tells you exactly how to do it.

[PTCDC5]

You can do that, but kpro is the option most of us use on the k20. You can disable the o2 CEL in kmanager.

[00CelicaGT]

You can do that, but kpro is the option most of us use on the k20. You can disable the o2 CEL in kmanager.

$6 vs $500+, you do the math.
i used one on my celica for a while, best $6 I ever spent lol

[bennett1]

$6 vs $500+, you do the math.
i used one on my celica for a while, best $6 I ever spent lol

agreed.

Update, I did the homemade cat-defouler and the car passed emissions perfectly. I will be getting kpro eventually, but I needed the car registered before I went back to school. Thank you all for the help!

[NOCLUE]

Good stuff