GM 3 wire O2 sensor dilemma

[ECMnut at aol.com]

Thanks Shannen,
that is the second response for checking grounds.
My 02 sensor is actually after the turbo, on the downpipe..
Maybe I should weld a threaded tab to the downpipe..
Is there such thing as too good of a ground?
Mike V

In a message dated 10/15/00 5:28:49 PM Eastern Daylight Time, 
shannen at grolen.com writes:

> 
>  AUGH!!!
>  Hi, Mike. : )
>  You might try checking the grounds.  Especially the O2 sensor circuit
>  ground.  On typical smallblocks and 4.3's it's at the thermostat
>  housing, and the threads will corrode.  If it's bad it can play hell
>  with O2 readings and driveability.  Best bet, IME, is to check by
>  removing the bolt/stud and looking at threads.
>  
>  Shannen
>  Yeah, I know, you don't read all the posts.  I think eventually every
>  subject in the archives will have "check the grounds" as a reply. : )
>  
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