bank 2 sensor 2 is going bad in my 4.7L. I want to try out the spark plug non foulers to see if it will turn off the CEL. will it help/hurt anything if i go ahead and install 2 even though i still have the cats on? I'm thinking about cutting out the cats and putting in a new y pipe soon, would this also hurt me any? I get ok mileage right now but im wanting a little more sound from the exhaust and i have also heard that the factory y pipe is the most restrictive part of the exhaust. What do you think?

 

wont work

 

Oh come on AF Hemi, it can work.

It works for some but not for everyone. Ive got 4 non-foulers now that Im not even using because I had mine turned off with CMR tuning but there are guys out there that do use them and have no issues.

As for removing the cats and such, do you ever do any visual or emission checks at all?

 

I ran two non-foulers on my '98 Ram with no cats. Got no CEL after I installed them. Just put one on a Jeep Wrangler for a buddy after we gutted his clogged to sh*t cat and three weeks later, no CEL yet.

 

The non-foulers have worked for my truck. Got a CEL when I installed the high flow cats and headers. Put some non-foulers on and the CEL has been gone ever since.

 

im using the non-fouler trick for a cat delete also, but that wasnt the original question. the question was, he's got a bad o2 sensor with the cat still there -- will this turn off the CEL. the answer is no, because the cat is still there. with the o2 sensor bad already, then being recessed out of the exhaust stream, AND having the cat there, the sensor would be getting practically no reading at all. you'll just need to replace the o2 sensor unless you can wait until you get the y-pipe and do the kitty delete. Then the bad o2 sensor might fix the problem without having to do the non-foulers.

Otherwise you're stuck getting a new o2 sensor either way. To answer the second question, yes the non-fouler trick should work to get rid of the CEL if and only if you have good o2 sensors and no cat.

 

True true, I guess I read too fast.....LOL

Either way, no cats or NFs here!! ;-)

 

Yep, you are correctamundo... Sometimes I find that I skim over the posts too quickly and only picked up on ditching the cats and non-foulers.

Yep, gotta replace a bad O2 sensor, no two ways around it...

 

Yep. No reason to spend money to try and bandaid a bad part either. That's sounds a bit yahoo'ish to me.
Local parts store is outrageous for sensor pricing because they think they got the customers trapped.
I checked pricing for a bank 1 sensor for my Exploder...NAPA wanted $64. Prices online were lesss than half that shipped. So, I picked up a used one off Ebay for $11 shipped. It's been in for a year now.

Also, if the rear sensor is bad, there is a chance that your cats could be plugged, but the chances of that are alot less likely than a bad sensor. You can pull the sensor and do a resistance check to see if it's any good.

 

ah ok i didnt figure it would. i priced one with our business discount and it was 89 bucks. thats why i was going to see if was going to work even though i was going to need them eventually anyway. I may just find one on ebay if it ends up being the sensor. Thanks for the info