[V8] Failed Emissions

[John Bysinger]

First thing I always check with other vehicles when HC is high (unburned
fuel) is spark.  Fouled plugs, worn plug wires, etc.

-John
'90 v8q

On 5/18/07, S_Matus <scott_matus at yahoo.com> wrote:
>
> The 91 failed the emissions test this morning.
>
> The HC  and CO were out of spec (According to the state of Colorado).
>
> What diagnosis procedure should I follow to get it back in line?
>
> HC was 6.4 g/ml and
> CO was 179.2 g/ml
>
> A year ago I replaced the O2 sensor.  Could it be a bad ground on the
> O2?.  Could this be the Head temp sensor?
>
> Any help is appreciated guys.
>
> Scott.
>
>
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-- 
-John at bysinger.net