catalytic converter

  1. johnlyckdal

    Fail To Pass Emissions

    I recently went to get my car inspected and it failed on emissions. The values are as following: CO: 5.5 (0.5) HC: 403 (200) CO: 2500rpm 1.0 (0.3) Lambda: 0.74 (0.97-1.03) Read around for a little while and seems like im running very rich, (hence my poor fuel economy), and most likely need to...
  2. K

    Advice please, 2006 A3 8p Decat downpipe

    Hey guys,new member here! So this is my first Audi,I've had it for about 2 years now. Its the BWA spec(147KW) ,2.0Tfsi DSG. Car is completely stock,so I wanted a bit more power out of it.So tomorrow I am going to install a 76mm decat downpipe..My question is,have any of you installed similar...
  3. xkieron99x

    Am I going insane, p4020

    So I’ve docutment in my ownership build that for the last couple of months that I been battling a ineffienct cat issue, I’ve replaced the underfloor cat, o2 sensor, ensured there is no intake or exhaust leaks. I finally thought it must be the pre cat must be failed. My local Audi specialist...
  4. Elroy_starr

    Nox sensor

    Hi guys, New to the group so go easy on me Finally got an A3 in March after years of wanting one! 8pa 1.6fsi sport, very tidy car and real happy with it (although a little slow). Got my first ever check engine light in 10 years of driving over the weekend, finally a chance to use my obd scanner...
  5. C

    Catalytic converter rattle

    Hey everyone, I have a VERY annoying cat rattle in my 2002 1.8 na A3. I was just wondering if I can just bash it out or if a replacement is necessary? As there is a post cat sensor I'm pretty sceptical on bashing it out. Cheers
  6. Pro-cookie

    Catalytic converter

    Ok I’ve had on the car ever since I got it a cheap cat cost £100 it’s had two in total in 2years as they need replacing each MOT! Also since owning the car the engine management light has been on and I’ve had it cleared about 3 times each time it shows the cat to be problem. My question is why...
  7. Jefecito

    Catalytic converter

    Hi, Can anyone who has access to PFL OEM part numbers confirm that the cat converter part number is 8U0131701A ? 8U stands for the Q3, I found online that it fits the RSQ3, RS3 and TTRS. Cheers.
  8. Ryan Lyes

    Audi S3 exhaust options

    Hi I've recently bought an Audi S3 8P 3 door and after having it on a ramp it looks as though the cat may have been cut out of the exhaust but the box the cat sits in is still in place, can anyone recommend a high flow sports cat that fits the one system or recommend any workshops that could...
  9. scotty dugg

    S3 - Pre-Cat Delete or De-Cat (Turbo Inspection/Clean)

    Hi all, Looking for some advice on where to go with my S3, in short I'll be taking off my down pipe in the near future and want to know if it is possible to inspect/clean the turbo and/or the actuator whilst it's off? Also car is stock otherwise, would it be best to stick to the plan and...
  10. Craig Kelly

    Need help with my Cat part number please (A3 1.8T / AUM / 2001)

    Hi everyone, my local Audi specialist just told me I need a new Catalytic Converter due to my motor failing it's MOT on emissions. They want £900 for it, my car is only with £500. I've checked eBay and theres a million of them on there but none seem to be for mine The part number they have...
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