ECM fault?

[David Cooley]

At 01:57 PM 11/9/1999 -0500, Akselrud, Boris wrote:
>I've checked this out too at some point. I even went as far as checking
>pressure in exaust manifold. I don't remember the figures now, but it was
>almost non existant comparing to the numbers in the service manual.
>
>I am pretty sure that there are no holes in the exaust system. However I
>have doubts about catalytic converter. Exaust sounds kind of loud and
>humming at some RPM. Could failure of catalytic converter cause O2 sensor to
>misbehave and react slowly? I've been through this hypotesis before, but the
>problem is that to test it I need to put a new catalytic converter in, which
>is not cheap.


If the converter is plugged a bit, it could cause the symptom... Might try 
and run it with the converter out and see what happens.

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David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
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