Admitting Defeat....Petrol Emissions Woes

[Niall]

The Lambda reading is also out on the 1st fast idle test though, surely the cat can't affect that reading?

Although I realise that could just be a low engine temp as it dropped for the 2nd one....and 'warm coolant pipes' doesn't seem overly scientific lol.

Yeah Lambdas don't work well at all until heated up hence why they have built in heaters but again, cheap ones just don't work that well. Its passed on the 2nd idle but not very well. This is why i always give my car a good ragging before its mot. Last years they left it to heat up for 15 minutes as i literally drove it 1 mile to the test station from cold. 2nd test passed perfectly.