I'm having an intermittent rich running problem with my 90 2.1 liter Westy.
 This was the same symptom that I had that was fixed 13 mos. ago with a new
temp  II sensor. This has been replaced with no effect. One other
interesting thing  that I noticed when attempting to install a wire to feed an oxygen
sensor  monitor was that just connecting an additional wire to the sensor
causes an  immediate rich running condition. I had a problem this morning
when the engine  was started cold with running rich also. Am I looking at a
problem involving  cleaning up some grounds again. I'm thinking that I may also
need to test the  voltage coming from the sensor and also at the ECU. Any
ideas towards diagnosing  this problem would be greatly appreciated.

David  Clarkson
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