When is a heated 02 sensor necessary ?

[Dave Zug]

geeze, get a new o2 to eliminate it from suspician. Check fuel pressure and
pump voltage. Turn the adjustable regulator all the way up to see if that
affects it. Run the car up to the RPM that the problem occurs without using
WOT, then use WOT and see if the o2 drops immediately or waits until the
rail is depressurized (if you dont have a guage)

Dont do WOT blasts with that o2 reading persisting and test with a buddy in
the other seat while you drive and watch the road.

If you get knock than its pretty sure the o2 is telling the truth.


----- Original Message -----
From: Edmond <euro at lvcm.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, November 01, 2000 2:21 PM
Subject: Re: When is a heated 02 sensor necessary ?


> My Diacom scans show the 02 steadily DEcreases to about 300-400 MV at WOT.
> LOL  It's nice and steady at 800-900MV in first and second but you start
> winding up in 3rd it starts a pretty steep descent to about 300mV. Strange
> eh ? Maybe I need more fuel at higher RPMs.
>
>
> ----- Original Message -----
> From: <timsiford at hushmail.com>
> To: <gmecm at diy-efi.org>
> Sent: Wednesday, November 01, 2000 1:49 PM
> Subject: Re: When is a heated 02 sensor necessary ?
>
>
> > Blade,
> >
> > The O2 *should* be swinging back and forth at idle.  At WOT it should be
> > fairly steady in the upper mV region.  I have had the SLP headers
> installed
> > on my car for some time and am running the stock O2 sensor (actually a
> bosch
> > one wire O2 sensor) with zero problems.
> >
> > Tim
> >
> >
> > At Wed, 1 Nov 2000 12:47:33 -0800, "Edmond" <euro at lvcm.com> wrote:
> >
> > >
> > >
> > >Hey guys. I just wanted to ask this question to get some opinions. It
> > >=
> > >looks like I might have to get one. I installed Edelbrock headers on
> > >my =
> > >L98 engine and the brand new 02 sensor I put in, swings from like 54mV
> > >=
> > >to almost 900mV at idle. I even got a "low 02" error code once from
> > >the =
> > >ECM. Would a heated 02 sensor help alleviate this ? Is one necessary
> > >=
> > >when putting headers on ?
> > >
> > >
> > >
> > >
>
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