Re Abnormal O2 reading

Thu Sep 3 15:51:54 GMT 1998

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On 9/2/98, Alan Briggs said:
>I am befuddled!  I have a Range Rover with O2 sensors that drift
downwards >in voltage.  Just warmed up the sensors cycle from 800mv to
0mv.  As the >engine

I've seen this before on a Range Rover.  From what I saw, the owner
merely kept using the rover until the situation eventually got worse
with time, the engine would just eventually quit for no apparent reason.
Was a weak fuel pump dying.  The O2 sensor normally fluctuates like how
you described as the ECU tunes the mix in normal use but if it seems to
loose the battle and the O2 keeps reading 0, then it could signal
something bad developing.  

Cheer,
alex samson

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<P><FONT SIZE=3D2 FACE=3D"Arial">On 9/2/98, Alan Briggs said:</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">&gt;</FONT><FONT COLOR=3D"#000000" =
SIZE=3D2 FACE=3D"Arial">I am befuddled!&nbsp; I have a Range Rover with =
O2 sensors that drift downwards &gt;in voltage.&nbsp; Just warmed up =
the sensors cycle from 800mv to 0mv.&nbsp; As the &gt;engine</FONT></P>

<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">I've seen this =
before on a Range Rover.&nbsp; From what I saw, the owner merely kept =
using the rover until the situation eventually got worse with time, the =
engine would just eventually quit for no apparent reason.&nbsp;&nbsp; =
Was a weak fuel pump dying.&nbsp; The O2 sensor normally fluctuates =
like how you described as the ECU tunes the mix in normal use but if it =
seems to loose the battle and the O2 keeps reading 0, then it could =
signal something bad developing.&nbsp; </FONT></P>

<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Cheer,</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">alex samson</FONT>
</P>

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