"robb" <some@where.on.net> wrote in news:8L-
dnY2qKZjT0rzXnZ2dnUVZ_vOdnZ2d@earthlink.com:


<snip>


>
> I did not know it was standard practice to replace the O2 sensor
> every ~80K ? i know i have never done it.




It is NOT "standard practice". You replace the sensor once it stops
behaving as it should.

You're way high on HC and NOx on both years' tests, but the '09 CO of over
9% may be just a one-time glitch. It could simply be that the cat was
insufficiently warmed up for both tests.

You don't have EGR, so that won't be an issue. Have you ever checked the
basic ignition timing? How old are your plug wires/cap/rotor/plugs?





>
> I can and will test it (as i can) to see if it is suspect but
> according to those O2 comments and even some of your own posts
> about O2 sensors ... the O2 should probably be replaced ?
>
> Anyways what happens if you get failed twice ?




Don't know. In my area you can have it tested any number of times until it
passes. I think you have to pay for each retest.




> Right now i have
> to show proof of work done to get it tested again for free ?
> other wise i am out $50.




If you randomly replace parts with no success you'll be out at least that
amount anyway.

First thing to do is re-book the test, but at a different station. Make
sure you're the very first car on the machine for that day. Take the car
for a long drive (at least an hour) and time your arrival at the station
with just enough time to hand in your key. TURN THE ENGINE OFF; DO NOT
ALLOW IT TO IDLE. They should have the vehicle on the dyno within fifteen
minutes at the outside. This will ensure the cat is up to temp and as
efficient as it can be, which is critical.

IF the car fails again, even when properly prepped, THEN you start doing
troubleshooting. The results from this test, combined with the results from
the other tests, should be enough for a competent tech to daignose the car.


--
Tegger