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NCT Emission Fail

tb66 · 2015-01-30 19:40:40

Hi All Failed NCT on emissions and just wondering if anyone has an idea what the problem is Low Idle CO 0.15 vol% Above 0.50vol% fail HC 43 ppm High Idle Lambda 1.00 Not between 0.97 and 1.03 fail CO 0.49vol% Above 0.30vol% fail HC 73ppm Above 200 ppm fail Its a 1litre Corsa. There is a new exhaust and new plugs in it. I…

30-01-2015 7:40pm

#1

tb66

Registered Users, Registered Users 2 Posts: 101 ✭✭

Join Date: January 2008

Posts: 89

Hi All

Failed NCT on emissions and just wondering if anyone has an idea what the problem is

Low Idle CO 0.15 vol% Above 0.50vol% fail
HC 43 ppm
High Idle Lambda 1.00 Not between 0.97 and 1.03 fail
CO 0.49vol% Above 0.30vol% fail
HC 73ppm Above 200 ppm fail

Its a 1litre Corsa. There is a new exhaust and new plugs in it. I do suspect the egr valve has been blanked as there is a plate between it and the engine block. Might this explain why low idle is grand and high idle is not. The tester seemed baffled why one was ok and the other not.

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