Funny Oxygen Sensor Readings

[ECMnut at aol.com]

In a message dated 5/28/00 9:55:29 PM Eastern Daylight Time, 
bobc at shell2.tiac.net writes:

> 
>  I am used to a sensor being slow to react (lazy) when it goes bad, could
>  this be an indication of some other problem like a header leak?  I would
>  think is should still act more linearly...
>  
If fresh air is getting into the system *upstream* of the 02 sensor, it will
give you a low number..  Is there a likelyhood of a header leak?
MV
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