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AudiAl
Needs to get out more



Joined: Apr 02, 2006
Posts: 109
Location: Coventry

PostPosted: Thu Aug 17, 2017 10:11 pm Reply with quote Back to top

Hello all, looking for a bit of advice regarding high CO emissions. Fitted with ABK engine, has failed MOT test with CO reading 1.6% (limit 0.3%), however lambda is spot on and HC level under 50.
Has had oil & filter changed, with plugs and air filter, long run at high revs before test but still CO high.
Im thinking along the lines of leaking injector allowing too much fuel through, has anyone else had something similar?

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Mikes2
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Joined: Jan 31, 2003
Posts: 9131
Location: Polmont

PostPosted: Wed Sep 20, 2017 11:36 am Reply with quote Back to top

was this at fast idle only or did it fail both tests ?

It's usually overfuelling that causes it, or rather unburnt fuel in the exhaust.

Even though you say lambda is spot on, does it change or is it stuck on the same value all the time ?

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