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Discussion Starter #1
There's a similar post up by mr mugen (http://http://www.gtr.co.uk/forum/126662-failed-emissions-co-help-please.html) but his problem is slightly different, so I didn't want to hijack his thread.

I failed to get my GTR on the road over here in Luxembourg cause the emissions didn't meet the requirements. Now, today I went to a garage to get the numbers and this is what it says:



It's been measured while idling. I'm a bit confused since I don't know how the lambda can be that high (as is the oxygen). Wouldn't that mean that it's running super lean or shouldn't it even stall? The thing is, the engine is running really good and since it's almost completely stock (apart from an Apexi induction kit and exhaust), I can't see how this is possible. Now, what I'm gonna do tomorrow is check the sparks to get already an idea if it's running too lean, but what else could cause this?

Any ideas?
 

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I'd also say that you've got a leak somewhere, as with this Lamda ratio you'll melt a hole into every single piston. On idle you should read around Lamda 1, on full throttle 0.8 at the max.

I'd check the piping for holes and the gaskets for leaks. Have you disconnected an injector???
 

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Some Japanese guys disconnect one injector if the have problems with passing the emissions test.

This way you use one cylinder to flush fresh air through the exhaust which means better readings for the test (and I guess a sligthly higher Lamda ratio).

This could also be interesting for you:

http://www.gtr.co.uk/forum/126492-how-prep-my-car-smog-testing.html
 

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Discussion Starter #7
Hmm, I actually had a problem with one injector not working properly and the engine running on 5 cylinders. I disconnected the ECU to check for signal and couldn't find anything wrong, so reconnected. Weird thing was that the injector was working again... ah well, checking for a leak first. thanks though :thumbsup:
 

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Be sure that the messuring sensor is far enough into the exhaust, or you will have trouble with the O2 being way to high!

The CO level is also very low, should be at a Max of 0,5 at Idle (Think thats the EU standard), and 0,3 at high idle.
It all indicates that the messuring probe/sensor aint far enough in the exhaust when messured.
If it is, then you've got a big leak in the exhaust system!
 
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