Should have said sensor or sensor grounds.  The ECU doesn't know what the
sensor actually puts out, only what is left after it goes through the
exhaust system, case, head, head grounds...

d

At 12:36 PM 4/11/2001, David Beierl wrote:
>At 07:57 AM 4/11/2001, Warren Chapman wrote:
>>running rich when the O2 sensor is attached.   Disconnect the O2 sensor and
>>it runs correctly.
>
>It would be difficult for that to be anything but a sensor
>problem.  Measure the output voltage with it connected and
>disconnected.  With the sensor disconnected it should go below a half-volt
>on closed-throttle deceleration, and should go above a half-volt on WOT.

David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"