about a month ago i went with a jegs y-pipe and did the non-fouler to the rear o2. me and my neighbor are starting on my plenum/tune-up tomorrow and wouldn't ya know it i get a CEL today LOL!

i searched for that code and of course it looks to be an o2 problem when people mess with/remove their cat. unless i overlooked it i didn't see anyone who got the CEL after the non-fouler trick.

should i ignore it until after the plenum/tune-up and reset it and see if it comes back (i will be replacing both o2's in the porcess) or should i be looking for something while tearing it down tomorrow?

 

The non-fouler shouldn't cause a CEL, but I've seen changes made to the exhaust cause a CEL and the non-fouler trick NOT work. Doesn't happen often, but it does happen.

Usually, removing the non-fouler and stuffing steel wool in it and putting it back on will get rid of the CEL problem...

 

I've heard of this, but not too common.

2 things you can try:

a 2nd non fouler with the bottom cut out and double stacked. Takes the O2 sensor even further out of the exhaust stream.

O2 Simulator: http://www.thefastman.com/02Simms.asp

Makes the PCM think the cat is working VERY efficiently. I have had one for about 3 years, it works, and it's passed inspection the last 3 years.

 

i doubled up on the non-foulers when i installed the y-pipe and i still have no cel.

 

That's the only way I've ever done it...

 

ok i'll double up when i replace them both.

do i need to drill out both or just the 1?

 

https://dodgeforum.com/forum/3rd-gen...ving-cats.html

 

thanks hammer. i'll do that when i replace both o2's later this week.

 

+2 I use one of these also. I've had it for several years too. That being said, I still have a cat, but I installed it when I installed my Magnaflow high flow cat because I needed another 02 sensor and I wasn't to insure the high flow cat didn't cause a CEL.

 

Is the non-fouler trick used on both 02 sensors or only on the one after the cat?

I got the magnaflow cat yesterday and need to do this trick still.