I got that same floor tile in my kitchen.

I tried Cataclean in an explorer that was setting cat efficiency code. Scan tool said cat eff was at 78% before cataclean. I'm told that eff must be above 80%.
I used cataclean and it changed my cat eff to ...

Wait for it....

78%.

Yup.It work well. It took my $ and gave me nothing. I assume that is the real intent of selling it.

The spark plug fouler trick got it to 92% and cost much less.

 

So - what is the plug fouler trick, please? Both of my cats are throwing codes off and on. Each are over 93% now. 2013 F150 Lariat 5.0 with 200,700 miles. I don't think this is bad enough to justify changing out both cats yet - everything runs fine (love my truck!) but I am concerned about pulling my camper for a 2-3 hour trip with some mild hills. Not sure where the line is for changing out. $1800+ just for parts. Any help?
Thanks!
N

 

It doesn't always work but it is cheap when it does work. you need 18mm threads in the non fouler.
This can explain it
https://www.svtperformance.com/threads/o2-sensor-cel-fix-using-anti-foulers-how-to-make.598215/

or

 

Thanks for the quick response! Not sure if this will help me? So - if this got you to 92% on your cats and I'm still at 93+ without excess load (camper) am I still at risk of burning up a cat while pulling the camper?

 

I only learned about this last night.... but my Buddy was showing me some of the "non fouler" pieces that he purchased, and they actually have some material from a cat in them. So it also it breathing like it has a cat hooked up.

 

The big issue I've seen with the Coyote's is they use oil. A lot of guys are adding catch cans to Coyote's to reduce/eliminate the oil usage. Some of them go through a quart every 1000 miles.

 

If you are getting 93% eff and still setting a light, then the eff pass / fail threshold has greatly increased since 2003 (year of explorer).
From my understanding converters overheat when too much unburned fuel is being sent into the exhaust. That should set a code for that bank being too rich.
I am not a catalytic converter expert.