Still have CEL after Vast eliminators?

[Allaidback]

after install I cleared that damn thing "Catalyst System; Bank 1: Efficiency Below Threshold" ...drove about a 100miles and came back on? Before it would come on within 20miles, sometimes showing both banks 1 and 2, but is just showing bank 1 now. I have awe stage 3 software custom 3" dp/exhaust with race cats. The o2 sensors have been re-located after the cats. Please help...I hate that damn orange light!

[JDM EJ1 95]

gahh me too.. awe software + defoulers

[The_Jerbel]

Relocate the pass side 2ndary O2 sensor further down the exhaust stream and use the defoulers.

[Allaidback]

new codes :


VAG-COM Version: Release 409.1-US

Control Module Part Number: 8D0 907 551 M
Component and/or Version: 2.7l V6/5VT G02 0002
Software Coding: 06611
Work Shop Code: WSC 06325
2 Faults Found:
17585 - Bank2: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1177 - 35-00 - -
17584 - Bank1: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 - 35-00 - -

[JDM EJ1 95]

those arent new.. those are the same ones you're talking about. in your original post

[mholme]

those arent new.. those are the same ones you're talking about. in your original post

They are different codes than warm up cat codes, however they are likely related to the same issue.

Any pictures of the welds? I've heard people having issues with holes around the welds causing these control limit reached codes.

[Allaidback]

Welds looked good. Haven't had the codes 17585 & 17584 before I put the vast eliminators on. But now I get the "cats below threshold code" or the "control limit reached" whichever set decides to pop up first. So yes, it seems they are directly related.

[nvrfollow]

Running test pipes and GIAC software, having the same problem. Is there no way to just tune the rear O2's completely out?

They measure the pre cat's efficiency right, could you just pull them out of the exhaust and cap or plug them into something to trick the computer?

[JDM EJ1 95]

fuck.. it seems like the new AWE/GIAC software doesnt like the defoulers.. my old socketed AWE stg 3 program never threw a code and the only thing i changed from last year to this year was the tune and now im throwing p1177 and 1176 codes ...


gheyness...

[2001S4NY]

of course you can tune out the rear 02 sensors and just about any other sensor on the car ;)

[Allaidback]

of course you can tune out the rear 02 sensors and just about any other sensor on the car ;)

GIAC will not do it, so how? or are you being sarcastic?

[2001S4NY]

GIAC will not do it, so how? or are you being sarcastic?

no im being serious i do it on all my cars

[Sleeeper X]

no im being serious i do it on all my cars

I can vouch for that

[sCeRaXn]

What kind of race cats do you have? Whats the cell count and does it use a metal or ceramic catalyst? Also, where are they located in the exhaust path? Typically, metal cats with higher cell counts should be placed closer to the motor because it needs more heat to work effeciently. They flow more, so they dont hold as much heat as the more restrictive ceramic cats(which can be placed further downstream).

If you cant code the 02's out with your software, you might have to mess with your cats until they are working effeciently enough to not cause codes.

[JDM EJ1 95]

<no cats

[Allaidback]

What kind of race cats do you have? Whats the cell count and does it use a metal or ceramic catalyst? Also, where are they located in the exhaust path? Typically, metal cats with higher cell counts should be placed closer to the motor because it needs more heat to work effeciently. They flow more, so they dont hold as much heat as the more restrictive ceramic cats(which can be placed further downstream).

If you cant code the 02's out with your software, you might have to mess with your cats until they are working effeciently enough to not cause codes.

Here is a picture of them...don't know the brand. Even with no cats, people are having the same issue though?

[JDM EJ1 95]

is that oil all over your O2s?

[Allaidback]

is that oil all over your O2s?

lol...yeah (gear oil from the trans), pic was taken before I replaced flange seal and o-ring, and added the vast eliminators.

[sCeRaXn]

I cant really tell anything aboutthe cats from looking at the pic, but the location should be good no matter what kind they are. Maybe the gear oil fouled the 02's The eliminators will only work if the 02 in them is working correctly. They only limit the amount of exhaust gas that the 02 sees, so if the sensor is subpar then it will still throw the code. I would replace the rear 02s and go from there. Good luck man.

BTW-I would lengthen the 02 wires so that they dont make such a sharp bend coming out of the sensor. Little things like that can cause a sensor to go bad prematurely.

[MacDaddy]

solution:


works on cars with no cats.

[nvrfollow]

^^ Who makes those ^^

of course you can tune out the rear 02 sensors and just about any other sensor on the car ;)

So if you can tune them out on GIAC please elighten me...

[kodycobra]

^^ Who makes those ^^

Found it doing a simple search... http://autosportstyle.com/shop/unive...r-p-64035.html

I've never seen this design before.

Although... I used to make these for my mustangs, and they worked everytime!

http://www.paladinmicro.com/MustangMILEliminator.htm

[Allaidback]

what are the cheapest o2 sensors I can buy? and can I just cut/splice the wires from the old o2, instead of pulling the whole sensor out? But wouldn't I be getting other codes too if my o2 was bad?

Damn...If i would have seen those eliminators, I wouldn't have had to drop the exhaust and weld new holes!

[JDM EJ1 95]

i dont think you need 02 sensors.. really i dont.

my car is doing the same thing and my o2s are fine.. i really dont think they both went bad at the same exact time.

[Allaidback]

i dont think you need 02 sensors.. really i dont.

my car is doing the same thing and my o2s are fine.. i really dont think they both went bad at the same exact time.

are you going to replace the coolant temp sensor? I just would imagine other codes being throw if that sensor was faulty?

*UPDATE* CEL came on again...this time bank 1 is below threshold and bank 2 is control limit reached.

[Allaidback]

replaced the coolant temp sensor and same two codes being thrown :

2 Faults Found:
17585 - Bank2: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1177 - 35-00 - -
17584 - Bank1: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 - 35-00 - -

Only other symptom would be an air intake leak according to AWE? How do I check for this?

[The_Jerbel]

With a boost leak test.

[Syrus5o]

bring this thread back. Anyone have any success yet? I need to get my cars emissions done. The only solution I saw working were the vast eliminators, until I stumbled upon this thread.

[bassed]

Relocate the pass side 2ndary O2 sensor further down the exhaust stream and use the defoulers.

Why this shite should be coded out in the Tune.

[S4::HB]

I have the same problem. Had bungs relocated even. Also GIAC...it's stupid because with APR they get rid of your CEL in the 2+ code they have - however i didn't really like apr so i went GIAC and had CEL again

[JDM EJ1 95]

<still have CELs and poor gas mileage.

[Syrus5o]

and you said you were using the vast eliminators? Have you tried stacking two or three spark plug defoulers?

[Syrus5o]

well I just ordered a pair. I'll try them out tom. I'm praying they will work, I need to pass emissions to register the car

[JDM EJ1 95]

im not using vast elims... i am using spark plug defoulers.

[Evilevo]

im not using vast elims... i am using spark plug defoulers.

I used that on my Evo. Worked perfectly. Just got the VAST ones for the S4 cause i was too lazy to make the new ones. I would let you know if they work, but i dont have the car. It is getting the motor pulled. I think i am going to switch to VAST software tho so I'm going to see if they can tune it out. I will be running the car for a bit on the GIAC tune, So i will let you know if it fixes it

[Syrus5o]

Yeah I read you weren't using them, I asked before if maybe throwing a third defouler would work. Tomorrow I'll see if the vast ones will work if not I'll just switching my giac tune for a vast file

[JDM EJ1 95]

i threw on a third defouler.... to no avail

[2001S4NY]

just code them out ;)

[Syrus5o]

If I had the skills to I would so if the eliminators don't work I'll just get a vast file with them tuned out

[Evilevo]

If you could code them out, that means you can tune yourself. Sadly that isnt available to the public yet :(