At 01:42 AM 7/11/02 -0400, you wrote:
>I received my OBD I scanner today and what I found was that the O2 sensor was
>fluctuating from .08 v. (lean) to .48 volts (center) to .92 volts (rich) and
>everywhere in between, as fast as you can read it. Is this normal for an o2
>sensor?
It's normal. The pcm is alternating the fuel mixture between lean and rich,
depending on other sensors' inputs, in an attempt to reach a stoich (14.7:1)
mixture for emission reasons. One indicator that the O2 sensor is working
properly.
>Also, my rpm's fluctuate slightly as this is occurring, which is what made me
>think it's not normal. The only time it's steady is when it's idling and
>it reads
>rich (hot cam maybe?). James
Possibly.
Bob
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