Make sure you change oil before the emission test.
Add dry gas to fuel tank to lower the emission.
You probably can lean out the fuel mixture a bit more, but not much before
your engine idles rough.
If all above failed, then you need new cat converter.
Jens - 17 May 2008 21:11 GMT
> Make sure you change oil before the emission test.
>
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>
> If all above failed, then you need new cat converter.
Right, the catalytic converter is supposed to reduce NO contents. High
NO contents is then due to ineffective catalytic converter.
As said, you can cheat at little by leaning the mixture, but that
would lead to a higher HC contents. But still you may just pass one
more time.