[Shotimes] Re: O2 simulators

[Kevin & Cheryl Airth]

Justin:
 I am a little confused? How is the car going to run very good if the PCM
does not know if the mixture is too rich or too lean?
 I think the function of O2 simulators is not understood. The only reason
these came into use is on OBD II cars that have 4 O2 sensors. One before and
one after each converter.  If you remove the catalytic converters you will
get a continuous check engine light. The rear two sensors can be simulated
and "fool" the PCM into thinking the converters are in place and working
properly. The rear 2 sensors are not used for any engine control functions.
 Since your 92 only has 2 O2 sensors you don't want or need this mod. Also
if you remove your converters the PCM will not know the difference, other
than the change in airflow due to the change in exhaust back pressure.
.
.




> From what I've been told they simulate stoic (sp?) fuel mixture signal
> at all times. So is that fooling the ECM in a good way or a bad way? I
> don't want something along the lines of those resistors you put in line
> with your incoming air temp sensor that "give you 20 HP". If the car
> will run better with Bosch O2s, that's how I'll go. Don't want it to run
> worse (or melt my cats) just to have my CEL out. Thanks for the input!
>
> Justin
>
> >>> "Steve Weinrich" <stevwein@swbell.net> 06/04/03 08:43AM >>>
> They just fool the computer into thinking that you have a set of
> working O2
> sensors.
>
> Primary application is for use with an off-road pipe with no cats.
> These
> will prevent the CEL from coming on due to lack of proper sigam from
> the
> sensors.
>
> They're sensor simulators.
>
> Steve
> ----- Original Message -----
> From: "Justin Schick" <jschick@aafp.org>
> To: <stevwein@swbell.net>
> Sent: Wednesday, June 04, 2003 8:40 AM
> Subject: [Shotimes] Re: O2 simulators
>
>
> > Would you classify them as worthwhile? My Pontiac buddy is in love
> with
> > them, but then again all he can talk about is modifying his car,
> > justifiable / worthwhile or not.
> >
> > Justin
> >
> > >>> "Steve Weinrich" <stevwein@swbell.net> 06/04/03 08:37AM >>>
> > Try a Google search for "MIL eliminators".
> >
> > You can buy them for around $30 per pair or make your own if you're
> up
> > to
> > it.
> >
> > Steve
> >
> >
> > ----- Original Message -----
> > From: "Justin Schick" <jschick@aafp.org>
> > To: <shotimes@autox.team.net>; <TechSHO@topica.com>
> > Sent: Wednesday, June 04, 2003 8:21 AM
> > Subject: O2 simulators
> >
> >
> > > I'm looking for any input on these little critters. I recall some
> > kind
> > > of post about them here a long while back. My only other
> experience
> > is a
> > > friend that used them in his old WS6, and new GTP. I'm in need of
> > > replacing my O2s, and am debating if I should try these or not.
> > >
> > > Justin
> > > '92 SHO in KC MO, 190k and counting
> > > SHOTimes list info: http://www.shotimes.com/SHO1.html
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