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Thread: Weird issue with O2 sensor and idle hunting on 2010 VW Polo 1.6 TDI CAYB

  1. #11
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by zach138 View Post
    @Jack@European_Parts

    Hello again.

    So a couple of days ago I visited the tuner who did the software rollback to my Polo.

    Along with his mechanic we did a full mechanical test on my car (including smoke test) as well as testing with VCDS which revealed a faulty EGR.

    My tuner suggested that it is better (in terms of perfomance and monetary) to delete EGR rather than replacing it.

    Following this I would like to ask your opinion on the following:

    - Is it safe to delete EGR without deleting DPF? Cause I have read around that once you delete EGR it is good to delete DPF as well (which I am not gonna do mainly due to MOT reasons)
    - In case that I replace EGR with a new one, it will need coding through VCDS, is that right? In such case can you point me to a guide of doing this coding myself?

    Thank you again for your consideration; I look forward to your thoughts and advice.
    Jack is pretty firm in his belief that no emissions-control related things should ever be deleted, so I think you might be asking the wrong person for this kind of advice.

    In fact, you might want to steel yourself for something of a rant.

    -Uwe-
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  3. #12
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    Quote Originally Posted by Uwe View Post
    Jack is pretty firm in his belief that no emissions-control related things should ever be deleted, so I think you might be asking the wrong person for this kind of advice.

    In fact, you might want to steel yourself for something of a rant.

    -Uwe-
    Haha! Fair enough, I am also that type of guy thus the question. In fact I would like to delete it first in order to check that it is indeed faulty and then replace it with a new one and recode it.

    So let's "transform" my first question a little bit: In case I temporarily delete EGR, will this help me confirm that it is indeed faulty? So I can then replace it with a new one?

    (question number 2 is still valid of course )

  4. #13
    NostraJackAss Jack@European_Parts's Avatar
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    Jack is pretty firm in his belief that no emissions-control related things should ever be deleted, so I think you might be asking the wrong person for this kind of advice.

    In fact, you might want to steel yourself for something of a rant.

    -Uwe-

    IDK Uwe, it seems that there have been many forum inquiries recently & with specific requests to assist with AECD deletes & coming from this aforementioned tuner, no?

    At least there is a paper trail being established to identify it, huh?

    Haha! Fair enough, I am also that type of guy thus the question. In fact I would like to delete it first in order to check that it is indeed faulty and then replace it with a new one and recode it.

    So let's "transform" my first question a little bit: In case I temporarily delete EGR, will this help me confirm that it is indeed faulty? So I can then replace it with a new one?

    (question number 2 is still valid of course )

    https://www.epa.gov/sites/production...hsysrepair.pdf

    https://forums.ross-tech.com/showthr...torsports!-WTF


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    I can see your point out there Jack.

    As I said before I am not seeking assist on deleting EGR. I don't want to delete it anyways, I am only seeking to find a way to double check that it is faulty before replacing it with a new one.

    So let's forget this question and focus on the major thing. I can replace the EGR with a new one (WAHLER probably, what do u think?). But I am little bit confused on how to code the new one with my VCDS.

    Is there any guide to point me to? Or any advice on this?

    Thanks again for your help so far.

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  7. #15
    NostraJackAss Jack@European_Parts's Avatar
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    I can see your point out there Jack.

    As I said before I am not seeking assist on deleting EGR. I don't want to delete it anyways, I am only seeking to find a way to double check that it is faulty before replacing it with a new one.

    So let's forget this question and focus on the major thing. I can replace the EGR with a new one (WAHLER probably, what do u think?). But I am little bit confused on how to code the new one with my VCDS.

    Is there any guide to point me to? Or any advice on this?

    Thanks again for your help so far.



    What a fabulous bunch of self evident questions, let's ask ourselves some basic questions okay?

    How about test it using mechanical tools and the RTFB & using WD and decade box?

    http://wiki.ross-tech.com/wiki/index...ir_Information


    Remove FOD and do a repair that comports?



    Ever use a mighty vac?

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    Thanks Jack.

    At least for me these are not self evident unfortunately. I am not a mechanic and I am only now getting a little bit familiarise with all these terms.

    I am asking this forum for advice and guidance on my findings so I can see what's going on and discuss on these-possibly help others with similar issues. I think this is the role of such a forum.

    One more time I really appreciate your help.

    Additionally may I ask if there is a need for coding after replacing the EGR? If so, is there any guide/video that can be helpful towards that? Lastly is there any specific EGR brand that you can recommend for my VW Polo 1.6 TDI CAYB (2010 model)?

    I will replace the EGR with the help of a friend who is mechanic but we are both not so familiar with VCDS. In case that I replace it myself, is it safe to drive let's say 40-50 miles to visit a tuner that can code the new EGR?

  9. #17
    NostraJackAss Jack@European_Parts's Avatar
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    Thanks Jack.

    At least for me these are not self evident unfortunately. I am not a mechanic and I am only now getting a little bit familiarise with all these terms.

    I am asking this forum for advice and guidance on my findings so I can see what's going on and discuss on these-possibly help others with similar issues. I think this is the role of such a forum.

    One more time I really appreciate your help.

    Additionally may I ask if there is a need for coding after replacing the EGR? If so, is there any guide/video that can be helpful towards that? Lastly is there any specific EGR brand that you can recommend for my VW Polo 1.6 TDI CAYB (2010 model)?

    I will replace the EGR with the help of a friend who is mechanic but we are both not so familiar with VCDS. In case that I replace it myself, is it safe to drive let's say 40-50 miles to visit a tuner that can code the new EGR?

    The role of this forum is not a substitute for the RTFB, nor to be used without it with your VCDS scanner or to assist in ways of circumventing an AECD.

    As far as parts brands go, I'd say get the genuine part from the dealer & based on the correct attributes your car was originally certified.

    As to safety, I always again refer you to obtain the RTFB, proper training & you should never drive a car anywhere impaired, with MIL or modified FOD code.

    Additionally, I'd recommend a good read of the SSP for design and function of the vehicle you are working on.

    You would think that before modifying any vehicle, you would at least understand what it is you are doing or get alleged instructions from the "TUNER" especially who encouraged this behavior by deceptive marketing, huh?

    TTYT!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
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  11. #18
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    Thank a lot Jack for your help and advice; it is much appreciated.

    I will get back with results when I'll complete the replacement.

  12. #19
    NostraJackAss Jack@European_Parts's Avatar
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    Thank a lot Jack for your help and advice; it is much appreciated.

    I will get back with results when I'll complete the replacement.
    Great, I look forward to questions based on the RTFB and actual mechanical tests to be done without requests for opinions on an AECD removal or later equivocating with disingenuous words to try and get your answer like a traveling salesman, okay?

    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  13. #20
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    Quote Originally Posted by Jack@European_Parts View Post
    Great, I look forward to questions based on the RTFB and actual mechanical tests to be done without requests for opinions on an AECD removal or later equivocating with disingenuous words to try and get your answer like a traveling salesman, okay?

    That's far away from the truth I am afraid. But I can't and I don't want to change your mind. I respect your help and your contribution to my issue so far. Thanks Jack.

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