I have an 84 Westy and it is idling rough after warming up.  I suspect the
O2 sensor because I warmed the vehicle about 20 minutes and then
disconnected the 02 sensor and there was no change in engine idle.  My
question is "Is this a valid indicator of 02 failure?"  If not are there
any tests?  Also where is a good source for replacements?  Thanks.
jrwetz

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