Gee, that sounds way too logical!

 

No thanks...that will drive up the cost and reduce performance. The anti fouler is an excellent cheap and simple solutiuon to the CEL. I'm having a hard time figuring out why you are trying to come up with another solution. An electronic O2 sim tricks the computer the same way the anti-fouler does but costs a lot more money and as of now is more difficult and time consuming to install.

 

well i know it will drive up the price about $100 dollars and might reduce the performance aspect slightly but thi is a solution that will help alot of people who have the emission crazy states.

 

Im in one, but my plan is to swap the header out for smog test and then right back to the header :D

 

bump because i'm interested to know if this has gone anywhere...

i currently have a megan header and zpi s-pipe. this is my second tC (first had the original design megan header, the one with the pre-cat built in, and the factory s-pipe). both cars got a CEL. i've tried the antifouler setup and also an o2 simulator. my current car has BOTH the antifouler and o2 sim. no luck -- i still have a CEL.

is there a solution yet?

i was also thinking some about the air flow issue, and i wanted to float an idea out there for opinions. if this is a stupid idea, save the flames for someone else bc i already know it's a little wacky. and i'm not a mechanic. this is just a brainstorming idea...

so, now that i've qualified everything...

might it work to stop the CEL by putting several antifoulers together and "packing" one of them with something porous + nonflammable? the idea here is to "simulate" the reduction in air flow caused by the factory cat without actually interrupting the actual exhaust air flow.

right now, i'm running the following (starting from the s-pipe):

antifouler --> antifouler --> drilled out antifouler --> o2 sensor

this setup seemed to work better, as i got a lot farther before the CEL appeared. the worst configuration was no antifouler and the o2 sim -- i got the CEL almost immediately.

what if i added one more antifouler and then lightly packed one of the "chambers" i've created? i am not sure what material i could use which could withstand the heat of the exhaust and not fall apart & clog the downstream components. steel wool maybe? hmm...

just a thought. it's frustrating since i do know people with either the antifoulers or an o2 simulator and they have cured their CELs, while i'm 0 for 2 with the issue.

i understand that putting a high flow cat in-between the header and 2nd o2 sensor would prolly fix this, but then am i really any better off than keeping the factory header? it seems like putting a second cat in the mix is just an expensive way to produce a lot less power.

i'm intrigued by the idea someone else posted -- moving the second o2 sensor to behind the second cat. this seems like it would be pretty straightforward, although getting it mounted in the "right" place could be a challenge....

 

I also have the Megan Header and ZPI s-pipe with the antifouler and no CEL here, I've had this set-up for a couple of months now prob. about 20K miles on it with no problems, I wonder why you are getting it on yours when we have the same setup Zack? did you do it your self? or did you have a shop do it for you? thanks and hope you find a solution, I have read some where that if the O2 sensor gets damage during installation that it will throw a CEL, don't know if this is your case or not?

 

re locate your o2 sensor behind the cat on the midpipe!

 

gwtc, i dunno why i have the problem but you don't. i did the install myself both times. it isn't like it takes much brain power to drill out an antifouler. i have a friend out here with an '06 like me and he did the antifouler a week after i did mine. he has no CEL. i do. from what i've read in this thread and others, the antifouler only works some of the time. that is kinda weird, so there has to be some common thing about the failed vs. successful installs... could very well be a damaged o2 sensor. but what "damages" it???

thanx toyota_scion_tc. i will be doing a custom exhaust in the next month or so, which means i'll be at a muffler tuning shop anyway. moving the second o2 sensor makes sense. but like i said before: exactly how far back on the pipe should it go? i assume putting it too close or too far from the cat will cause it to produce incorrect readings and throw a CEL?

 

As long as its behind the cat then your fine. This is the cat I am using and it has a o2 bung built in! Its the Magnaflow 43036.

http://www.prostreetonline.com/buy/m...ngle%5Fsensor/

the sensor points to the rear and I used a m18-1.50 thread oil plug to plug the hole on the s-pipe.

 

cool. thanx!!!

 

Will this simulator/antifowler work without robbing horsepower?

I've seen 2 different dyno's on brand A headers.

7.3hp/3.6tq by Import Tuner w/O2 simulator
9.1hp/6.0tq by GSC (without O2 sim?)

This seems like too much difference to be blamed on different dynos.

Off topic: WeaponR when are yall going to start R+D on a carbon fiber cold air box for your intake?

 

The difference in power can be linked to the fueling, which is affected by use of a O2 sim. The lack of the sim most likely caused the ecu to run lean, increasing power but risking the life of the engine.

Sorry, no plans for a CF cold air box are in the near future.

 

I thought the second o2 sensor just monitored the exhaust gas and makes sure the cat is still healthy by giving the computer a different ohm or voltage reading then the first o2 sensor , so I dont exactly understand how the car would run lean without a sim. in place could u please elaborate weaponr-ray? thanks

 

If the 02 is simply installed without a SIM or CEL eliminator, the ecu would sense the increase in emissions. This usually causes the car to run in "safe" mode, and depending on the conditions, can run either rich or lean. I speculated lean based on the power increase of the test without the SIM.

 

yes I believe for a certainty this will fix the problem with ease, just relocate the second o2 sensor behind the since there is only 2. I had 4 on my sentra and I had to have 2 sensors on the header and 2 senors behind the cat which ran perfectly. The thing is, once you do this relocation the CEL DISSAPPEAR WITH-IN 2-5 DAYS EASILY. I'll will probably try it when I get my 4-1 race header

 

This will fix cel with no-problem: Its the Magnaflow 43036. I'm just backing up what others are already said, everyone with a header should get this part and have it in stalled and have the second o2 sensor installed: http://www.prostreetonline.com/buy/m...ngle%5Fsensor/

 

You can also just weld on a bung for the o2 sensor right behind the cat for a much cheaper install and not pay $200 for the magnaflow converter and another $600-$850 for the 4-1 race header, which is outrageous for only 26hp to me! I deffinitely going with the cheaper option on this one thanx guys!

 

still testing with the 43036 cat and relocated second o2 sensor and no cel yet after 515 miles

 

bump for more info from weapon r Ray

 

What other info are you inquiring about? The CEL eliminator has been working fine on numerous cars to date, and they have been available for sale for a few weeks now.