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
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