ECM fault?

[Akselrud, Boris]

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.

-----Original Message-----
From: David Cooley [mailto:n5xmt at bellsouth.net]
Sent: Tuesday, November 09, 1999 12:49 PM
To: Akselrud, Boris; 'gmecm at efi332.eng.ohio-state.edu'
Subject: RE: ECM fault?


At 12:12 PM 11/9/1999 -0500, Akselrud, Boris wrote:
>When I brought the car to dealership, one of the things they did is
>"decarbonated throttle body". I don't have a clue as to what that means, is
>this what you are referring to?

Yep.

Another thought is an Exhaust leak at the manifold.
===========================================================
David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
We are Borg... Prepare to be assimilated!
===========================================================