Ok i have k&n intake and AW headers and after i installed the headers with the antifouler my cel keeps coming on i just jeep restarting my ecu to get my gas milege back.. What should i do to fix the problem the .. it comes back on like every 200 miles after every restart.

Are you sure the CEL is from the anti-fouler and not some other problem? If your mileage is bad, it sounds like the main O2 on the header is acting up. The second O2 shouldnt affect richness (a/f) at all.

place the anti-fouler on the O2 sensor in the s-pipe instead of the header...supposedly that works

Are you certain your mileage is bad when it comes on cause if so then yes its the first one. Me thinks...

place the anti-fouler on the O2 sensor in the s-pipe instead of the header...supposedly that works

Well thats how its supposed to be in the first place!

whoa whoa whoa...

NEVER install the antifoulers on the header. NEVER

I've seen this on the forums quite a bit lately. I really hope you guys realize its the 2nd sensor on the exhaust side (go look at your s-pipe) that is throwing the CEL in the first place.

Kaeon's FAQ : http://www.scionlife.com/forums/viewtopic.php?t=56520 has the anti-fouler trick outlined perfectly. If you follow these instructions you should not have a CEL. If you do have a CEL and have followed his FAQ, then it is likely there is some other problem and you should get the car scanned to see what is really going on.

whoa whoa whoa...

NEVER install the antifoulers on the header. NEVER

I've seen this on the forums quite a bit lately. I really hope you guys realize its the 2nd sensor on the exhaust side (go look at your s-pipe) that is throwing the CEL in the first place.

Like I said I was under the impression people were not doing this...thats why I said that. Maybe I was wrong.

OMG!!! I cannot believe people would put anti-foulers/spacers on the primary O2 sensor!! Crazy.

I did put it on the header 02 sensor. But I took it off and put it in the right place. and it is still going off. I just hope the sensor is not broken. Ive heard its alot of money. :nails:

what will happen if you do?

Read the DTC that causes the CEL, then try to fix it. CEL does not have a universal solution - it can be triggered by a lot of things.

Um i have to pay for it.

Um i have to pay for it.
Autozone here does it for free.

No i know that i meant if the o2 sensor is broken then i would have to buy a new one and i hear they are expensive... cuz thats what i think it is i hear they are sensitive... and my uncle who installed it is not.

No i know that i meant if the o2 sensor is broken then i would have to buy a new one and i hear they are expensive... cuz thats what i think it is i hear they are sensitive... and my uncle who installed it is not.

Make him pay for it then. Im sure he will like that :lalala:

Well, diagnosing what's wrong just by the fact that you have a CEL is like saying "I don't feel well, how do I get better?".

So let's try to figure out what the problem is first, and then worry about prices of O2 sensors these days ;)

Get the code and give us a call we maybe able to help. We stock both 02 sensors if you need one. The front 02 shoudl not throw a CEL unless it is faulty regardless of A/F. The rear sensor does chane the gas mileage although it is not a wide band if it reads excessive flow it will dump fuel to compensate.

which o2 did you use the antifouler on. it needs to be on the s-pipe i think. someone correct me if i'm wrong

ive been haveing the same problem. the CEL comes on sooner and sooner everytime. .before it came on every 1000 miles or so with just 1 antifouler..so i put 2 antifoulers on and it comes on within 20 -50 miles..and i noticed when i changed from 91 octane to 89 it started showing up sooner..and my milage went from 32 to about 25 or worse..ive had my car scaned 2 times at autozone for free, and both time i got the same code p1036 bank 1 sensor 2. did you drill your antifouler out to 1/2 inch? i have the drilled out one screwed into the regular one and it still dont work. and the added length of 2 antifouler makes the o2 sensor hit and rattle on something under the car when i put it in reverse which i think might of damaged it. but i think im going to buy a new o2 sensor when the spipe gets here and try over again

which o2 did you use the antifouler on. it needs to be on the s-pipe i think. someone correct me if i'm wrong

You are not wrong but if you were you would have been corrected before you even posted.

I tried to drill all the way through one of the anti-foulers but I only had the strength and patience to get halfway through it so what I did was check to see if the sensor fit and it did but I had to lightly bore out the inside walls. I think that probably decreases the amount of flow the sensor receives too because basically only the top hole of the sensor is exposed to airflow. I used the 42009 foulers and maybe you should just buy another set and try what I did. Drill halfway through one of them and slightly shave away some of the inside walls at the bottom end (not the threading) with a smaller drill bit or whatever you want to use and then put it all together. Make sure you disconnect your negative battery cable for a few minutes so that it all resets and also make sure your s-pipe o2 sensor is actually plugged into the system in case you removed it.

as stated above, put antifouler in your spipe, and sensore in your antifouler, make sure all connections are tight, and disconnect the negative terminal on the battery (if you have an alarm system, make sure to disarm your system, if you dont do this, your alarm will sound once the battery is disconnected).

reconnect to the battery after like 5 mins or so, and see what happens...

ive had my car scaned 2 times at autozone for free, and both time i got the same code p1036 bank 1 sensor 2.
never heard of p1036, but do know about p0136.

Smells a lot like damaged O2 sensor:
http://zoltiz.com/cars/tc/files/cip0136.pdf - read up

The antifouler HAS to go on the S pipe sensor and you MUST use 2 of them with one of them completely drilled out (the one drilled out is the one that the sensor threads into). :doh:

ive had my car scaned 2 times at autozone for free, and both time i got the same code p1036 bank 1 sensor 2.
never heard of p1036, but do know about p0136.

Smells a lot like damaged O2 sensor:
http://zoltiz.com/cars/tc/files/cip0136.pdf - read up

sorry..thanks for the correction

MIne is connected in the right place . I got my anti-fouler from clubsciontc.com. Ill go get my car checked at autozone as soon as the hurricane is over.

Question???
If i am just replacing the exhaust and the S-Pipe do i have to use an anti-fouler??
The exhaust will have a high flow cat and a resonator
sorry if this a dumb question but i am not really sure....i will eventualy (sp) be getting headers but it will be a while down the road and then i am assuming that i will replace with anti-foulers!!!!

Hey miami, hit me up sometime i live here as well.

Question???
If i am just replacing the exhaust and the S-Pipe do i have to use an anti-fouler??
The exhaust will have a high flow cat and a resonator
sorry if this a dumb question but i am not really sure....i will eventualy (sp) be getting headers but it will be a while down the road and then i am assuming that i will replace with anti-foulers!!!!

No...you only need the anti fouler when installing a header. They are needed to trick the system into theinking the pre cat on the exhaust manifold is still there.

is it ok to just keep reseting my ecu to get my good miledge back for another 200 miles?



Just before it gets fixed? not as a solution..

yes

is it ok to just keep reseting my ecu to get my good miledge back for another 200 miles?



Just before it gets fixed? not as a solution..

Yea, It won't hurt anything.

Ok thanks is it normal that my cel doesnt come on until about 200 miles? If a sensor was broken it would come on right away right?

Ok thanks is it normal that my cel doesnt come on until about 200 miles? If a sensor was broken it would come on right away right?

Yea, that is kinda weird. Have you had the code read yet. You can go to most any of the auto parts stores and get that done for free.

Ok thanks is it normal that my cel doesnt come on until about 200 miles? If a sensor was broken it would come on right away right?
that could be normal, your ecu kinda works in a cycle... not so sure in this case though

but i would get that checked out asap before more damange happens

I have a question that is a little bit off topic but still about the 02 sensors. A guy I know with a DC Header is running his header with his first o2 sensor hole plugged with some dummy one. He says he couldnt get the sensor out of his old manifold because it was stuck somehow. Now I want to know, how bad is this for his car? I was just curious as to how much this would hurt him. Thanks!

how does the car run? That sensor monitors the air/fuel ratio!!! The computer probably has the car in "limp" mode where it runs pig-rich. Bad gas mileage and poor performance. You cannot just remove these things!!!

Im not sure how it runs but it still seems pretty quick. Its a 5 spd so maybe thats why it seems quick. We are having a Scion car show on the first of October and there will be a mobile dyno free for all Scion owners so I guess we'll see what hes getting. We both have the same mods.