2.7tt Catalytic Converter Code Trick

[k_harley]

So I have a 00 2.7tt thats getting a code for cat ineficiency on the pre-cat, bank 1.

I dont mod these, just repair them......Customer wants to know if there is a way around the cat code. I know gutting the cats seems popular, dont know what you guys do for the CEL?

Thanks for your help!

[obijohn22]

do a search for piggy pipe DIY. or piggie. shows how to relocate the O2 sensors. It does not always work. sometimes non foulers are needed.

BTW Audiworld will have the DIY article with pictures.

[haus4]

If its bank 1 sensor 1 then the sensor is most likely bad. Its is sensor 2, the one in the beginning of the main cat, you can space it out. But you need to keep sensor 1.

[espo4442]

buy the anti foulers from RAI.. /end

[JDM EJ1 95]

buy the anti foulers from RAI.. /end

or buy spark plug defoulers from any autoparts store drill them out and they are the same thing for 2 dollars

[SourDieselS4]

Not quite....RAI's are different, take a look. Im contemplating these, if they work with my 034 downpipes then its my top coice.

http://www.raimotorsport.com/product-p/raijbrear02.htm

[JDM EJ1 95]

Not quite....RAI's are different, take a look. Im contemplating these, if they work with my 034 downpipes then its my top coice.

http://www.raimotorsport.com/product-p/raijbrear02.htm

not exactly.. they both serve the same purpose.. relocating the o2 sensors out of stream... you just pay a lot more

[AwdOwns]

I keep getting the same code im running Miltek Dp's. Im gonna throw some defoulers on and see if that takes care of it. Would there be any other reason id be throwing that code?

[SourDieselS4]

not exactly.. they both serve the same purpose.. relocating the o2 sensors out of stream... you just pay a lot more

Iv heard a lot of mixed reviews on the spark plug defoulers, they work for some people, not for others. RAI said they have a 100% success rate with the J pipe the build into every one of their test pipes. I know it serves the same purpose, some people buy the CEL elminators from VAST for $29 a piece so i dont think $32 is a bad deal for something a little different that has proven to be even more effective.

[k_harley]

If its bank 1 sensor 1 then the sensor is most likely bad. Its is sensor 2, the one in the beginning of the main cat, you can space it out. But you need to keep sensor 1.

No, its the CAT, not the o2 sensor thats bad.

OK, I will check those out, worth a shot over the $1000+ cat with downpipe Im sure!

Id just be skeptical about the room to fit an antifouler, its tight in there!

[JDM EJ1 95]

Iv heard a lot of mixed reviews on the spark plug defoulers, they work for some people, not for others. RAI said they have a 100% success rate with the J pipe the build into every one of their test pipes. I know it serves the same purpose, some people buy the CEL elminators from VAST for $29 a piece so i dont think $32 is a bad deal for something a little different that has proven to be even more effective.

meh. do what youd like. thats the issue with the audi community they dont realize how many things you can do exactly the same on the cheap. they just go strait of marketing/advertising/word of mouth and are too afraid to try some new things

the VAST CEL elims have EXACTLY the same diameter inlet as a spark plug nonfouler. and also look to be similar in length.

go grab some and compare. surely you would be willing to spend a couple bucks to prove your point if your willing to spend 32 dollars on something that costs nearly nothing to make.

ive been running stacked spark plug non foulers for over 30k miles now with no issues and no CELs on my stg3 with GHL downpipes and no cats.. cost me under 5 dollars and a couple min of my time.

[JDM EJ1 95]

as shown here the non foulers needed.. all you have to do is drill the stepped lip on the inside of it so the oxygen sensor tip can fit in

[RAI Motorsport]

we went to the jbung design because as mentioned before the non fowlers are hit and miss for a lot of people. We tried to use this solution ourselves. the jbung has yet to fail (knock on wood...). trust me i totally understand and know that these are much more expensive then a lot of other options. But on our products we have to try our best to make sure that we can have solutions that will not fail. Also the jbung is made using the following component list

2 o2 sensor bungs (304 stainless)
1 90 degree bend (304 stainless)
1 o2 Thread adapter ( 304 stainless)
2 tig welded components

looking at that short parts list its easy to see why it cost what it does. We are working on another solution as well that will not necessarily decrease price (hoping too), but is a solution for much easier installation. their are a lot of good sloutions on the market outside of the jbung, but personally i wouldnt go with the anti fowlers, just because there are now many solutions for this problem that are purpose built. also it is best to use stainless steel on exhaust components.

[quickglx]

Always the ECU upgrade option... + ~50hp and eliminates pre catalyst monitoring with APRs stage 2.5 upgrade. Less than the cost of one cat

[supersweet]

so can you fit 2 jbung in that tight area of b5 s4? im running defoulers right now and im still throwing CEL.. but i didnt drill them out, this could be the issue.. im going to try that and if that doesnt work im going with the Jbung if they fit...

[awd2ks4]

i bought a set of defoulers like in the pic above and drilled them out and there was no way the 02 sensor was going to fit so i dont know how you guys are doing it ????

[mholme]

i bought a set of defoulers like in the pic above and drilled them out and there was no way the 02 sensor was going to fit so i dont know how you guys are doing it ????

The O2 sensor wasn't going to fit what? It goes right into the one you drill out and you screw the other one unmodified, right onto that and screw the whole thing in the bung.

[awd2ks4]

thats what did, The ones i drilled wouldnt fit onto the o2 properly. The head of the O2 would hit and not allow the sensor to be threaded in. So i ended up just getting the defoulers from 034 which are shorter then the other two defoulers when stacked up.

[JDM EJ1 95]

i bought a set of defoulers like in the pic above and drilled them out and there was no way the 02 sensor was going to fit so i dont know how you guys are doing it ????

i dunno.. mine fit fine.

[mholme]

thats what did, The ones i drilled wouldnt fit onto the o2 properly. The head of the O2 would hit and not allow the sensor to be threaded in.

You either used the wrong ones or didn't drill them out enough is the only thing I can think of. If they were 18mm non foulers, then they shouldn't have a ftiment issue.

[awd2ks4]

Thats what i thought maybe i drilled out the wrong ones. I used a half inch bit and hogged them out even more but they still didnt fit. and they were 18mm even the same part number that you posted. Some people said they fit with out drilling so im confused oh well

[betyouaint]

I'm considering fitting the j-pipes from RAI to my A4(B6) 3.0L but I'm concerned about having the space to thread them on in situ. Is it possible to do them without having to remove the cat or other components (other that the O2 sensors obviously)....?

[MTV2002]

the j-pipe is the way to go, i have AR design 3" downpipes with the test pipes installed. with the stacked defoulers the height of the o2 themselves, they always hit each other. they were way to high. the j-pipe takes care of that by screwing in from the side instead of the top. so to sum it up they give you more clearance. i could have bought the wrong defoulers, as some were higher than others but it still hit, bent my 02s to high hell and i just coded them out with the software. thats how your really get though the cat code because the post o2's are what gives you the cat code because of the two sensors reading the same because its free flowing and without the huge restriction of the cat. if your cat is bad or clogged thats how your ecu determines that.