Re: [alfa] Motronic Spider failed emissions

[sherwood white <vze2skmv@xxxxxxxxxxx>]

sounds strange if the co is over the limit i would suspect the wrong o-2 or bad o-2 sensor does the check engine light work?

Simon Body wrote:

> Greetings
>
> My 1991 Spider with Motronic fuel injection failed its emissions testing
> for the second time yesterday.
> Both times it has had:
>     Hydrocarbons ~4x the limit
>     NOx ~3x the limit
>     CO ~25% over the limit.
> Between the two tests, the O2 sensor, filter and plugs were replaced and a
> bottle of fuel injector cleaner run through it  It was a hot engine with >
> 20 minutes of good running before the tests. There was no improvement after
> replacing the stuff, in fact everything got about 30% worse !!   I
> interpret the results as the system running rich, but what can be done
> about it?
> Help.
>
> Simon
>
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