High emissions
High emissions
Took the car for an mot yesterday and the emissions were over 3 times higher than the mot limit . The tester asked me if it had been de catted but it still has the main cats and pre cats . He passed it anyway (thankfully!) as I've used them for quite a few years for mots but this is the first with the rs4. No fault codes showing, car appears to run and fuel economy is ok ( well as good as an rs4 will be haha!). Car has done 121k miles and had a full service including plugs 2k miles ago. Anyone any suggestions what to look at? I've got full edition of Vagcom sonwas thinking of trying log lamda sensor values and mad reading but don't know what they should read if there working fine . Exhaust valves open fine so my thinking was it shouldn't be a vacuum leak somewhere?
Re: High emissions
they need the cats hot[good wee rev first-idle doesnt help at all] then it falls into place,but i assume your mot man did this as they are pretty savvy and yours sounds "helpful" pre cats might be gutted but you wouldnd tell from looking at them
Re: High emissions
Mine did the same. Gutted precast. Still got main cats. He let mine go thankfully
Previously big turbo'd mk4 golf, big turbo'd Audi A3 Quattro
Currently remapped vw caddy
& 2009 rs4 saloon, TTS supercharged, mrc mapped, miltek catback, kwv3, h&r arbs, gutted precats, ceramic brakes 610bhp
Currently remapped vw caddy
& 2009 rs4 saloon, TTS supercharged, mrc mapped, miltek catback, kwv3, h&r arbs, gutted precats, ceramic brakes 610bhp
Re: High emissions
Ok thanks for the replies . So nothing to worry about by the sounds of it .
Re: High emissions
Might need a carbon clean.
Audi S1 Sportback, 2014, Daytona Grey, Black optics, Privacy Glass, Bum warmers.
Audi RS4 Avant, 2006, B7, Phantom Black, Carbon pack, MRC Stage 2, Milltek resonated. 166k miles and counting....
Previous cars Audi A1 S-Line, Audi A4 quattro sport, Subaru Legacy B4 RSK, Nissan 200sx S14, Nissan 200sx S13, Ford Escort van, Ford Escort Rally car mk2, Mini-proper one....
Audi RS4 Avant, 2006, B7, Phantom Black, Carbon pack, MRC Stage 2, Milltek resonated. 166k miles and counting....
Previous cars Audi A1 S-Line, Audi A4 quattro sport, Subaru Legacy B4 RSK, Nissan 200sx S14, Nissan 200sx S13, Ford Escort van, Ford Escort Rally car mk2, Mini-proper one....
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