Re: GTV6 FAILED SMOG TEST / O2 Sensors

[James Montebello <jamesm@domain.elided>]

The size and pitch are exactly the same as an 18mm spark plug.  There are
weld-on bungs you can buy from a number of sources to fit a sensor where
there isn't one.  Most exhaust shops stock these, and many of the kits
to fit a display come with them.

The one wire sensors are unheated.  For your purposes, that's may be OK.
However, for an engine management system, it's not, since the sensor
has to operate properly for the system to operate properly.  Unheated
sensors give a false signal until they're hot enough.  If they're far
enough away from the exhaust ports (which they probably are on a GTV6
or Milano), they'll never get hot enough just from exhaust temperature,
so the reading will always be wrong.  Unheated sensors also tend to have
a shorter lifespan than heated sensors.  Spend the extra $20 on a three
or four wire sensor (the extra wires are for the heater, the fourth wire,
if present, is a dedicated ground for the signal).

james montebello

On Sun, 2 Feb 2003, Stefano Iachella wrote:

> Cats,
>
> Play around with this website and you can find sensors for as little as
> $23 1 wire. I don't know if all 02 sensors will screw into all fittings.
> Maybe someone knows this? The GTV6 Bosch one is $85 and a
> Walker discount one is $40.
>
> http://www.buyoxygensensors.com/
>
> I had been thinking of putting them on my non-sensor cars and still have to
> find what bolt and thread pitch to buy to weld on the exhuase pipe. I
> want to use one of these LED displays somewhere just for fun.
> Anyone know the thread pitch?
>
> Stefano,
> Oakland, CA
> --
> to be removed from alfa, see /bin/digest-subs.cgi
> or email "unsubscribe alfa" to majordomo@domain.elided
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided