Shielding the O2 Sensor Wire

[Len Sabatine]

   I find It best to see what a scope is indicating. Yes , external shielding
   can be of no benefit. All depends on the config at hand.
   Len

>I've had good luck with braided shielding in other applications
>(specifically, fire and gas detection systems), but it is very critical NOT
>to ground both ends.  The shield needs to be grounded on one end and the
>other protected by heat shrink or any method to prevent it from creating
>another ground path.  What happens is the creation of an antenna.  I missed
>putting heat shrink on one end of a cable and only a few wires from the
>braid touched the conduit.  When a portable radio was brought into the
>vicinity and keyed - the system tripped.  It turns out that no shield is
>better than one grounded on both ends (in my experience anyway).
>
>Joe
>
>----- Original Message -----
>From: "Len Sabatine" <sabatine at epix.net>
>To: <gmecm at diy-efi.org>
>Sent: Saturday, May 26, 2001 1:38 PM
>Subject: Re: Shielding the O2 Sensor Wire
>
>
> >      Braided ground shield seems to work best , both ends grounded.
> >      It does help remove any Rf garbage from the signal .
> >      A Scope will show how much trash is present in the general area.
> >     There's filtering built into the ECM for this purpose as well.
> >      Len
> >
> > >I posted this a week or so ago but apparently the server was down so here
> > >it is again.
> > >
> > >Many months back some posted a comment to gmecm about shielding their O2
> > >sensor wire to eliminate a problem with ignition noise. If you are still
> > >around I'd like to hear more about what you did. Shielded cable
>impedance?
> > >Length? How the shield is grounded, one end or both ends?
> > >
> > >Thanks.
> > >
> > >Don Burns
> > >
> > >
> >
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