Re: OXS CQ, Interval

[Andrew Duane USG/PE <duane@zk3.dec.com>]

Hairy green toads from Mars made Keleigh Hardie say:

> >From: dalcott@mtgbcs.mt.lucent.com
> >Subject: OXS CQ, Interval
> >
> >Does any one know the interval for changing the OXS sensor. 
> 
> There really is no recommended interval any more. You can replace it at 60k
> if you want, but I think you'll find that it's much more expensive than it
> used to be. That's OK though, the heated sensors seem to last forever for
> the most part. The only ones I can remember replacing recently (that didn't
> show up as a MIL/fault code) were either recalls, or had mechanical damage.
> Oh, and the one's on V8's seem to be less reliable than the rest.

This brings up a perennial question.

We all know the interval is useless, but how do you tell when the
O2 sensor is going/gone? Is there a seat-of-the-pants method, or is
the official test procedure required?

The reason I ask is that my '89 100Q has 140K on the original
sensor, and has been exhibiting some symptoms for a while now.

Gas mileage is not as high as it could be (but my lead foot might
have something to do with that).

Full throttle kind of "bounces" or stumbles a bit (doesn't full
throttle ignore the sensor?).

Not-quite-cold throttle response is terrible (???)

-- 

Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Digital Equipment Corporation		(603)-881-1294
110 Spit Brook Road
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too heavy to care.