ECM fault?

[David Cooley]

At 09:29 AM 11/9/1999 -0500, you wrote:
>O2 output does seem slow when you scope it. We did replace it, but I am not
>sure if it was genuine GM.
>Also I would imagine that right after the replacement while the sensor was
>brand new we should have felt at least some change in the idle character,
>but there was no change.
>That's why I am beginning to think that ECM program is causing it by
>reacting slowly or over/under compensating the sensor input. Do you think
>that it is possible? Of caurse if that's the case, I'll be stuck trying to
>reprogram it.

Did this suddenly start or has it done it since new?
Could be a leaky EGR valve, vacuum leak, bad PCV valve etc...
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David Cooley N5XMT Internet: N5XMT at bellsouth.net
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