[V8] Failed Emissions

John Bysinger doog at bysinger.net
Fri May 18 13:59:22 EDT 2007

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

'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.
> ---------------------------------
> Moody friends. Drama queens. Your life? Nope! - their life, your story.
> Play Sims Stories at Yahoo! Games.
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all
> contributions welcome!

-John at bysinger.net

More information about the V8 mailing list