You may be looking at this in the wrong direction. Perhaps it is not
really running rich (in terms of the carbs) but rather is suffering from
incomplete combustion. So it might be that your fuel mixture is correct,
as you have seen using colortune, but your timing (valve and/or
ignition) could be off just enough to get an incomplete fuel burn. Or if
you are really running rich, was the colortune test done with air
filters off? Restricted air filters can also cause rich conditions.
David Councill
67 BGT
72 B
dcouncill@msubillings.edu
-----Original Message-----
From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net] On
Behalf Of Paul Osborne
Sent: Thursday, May 05, 2005 10:52 AM
To: mgs@autox.team.net
Subject: Fwd: Burning Rich HElp
>X-Sender: paul@pop.ece.rochester.edu
>Date: Thu, 5 May 2005 09:51:38 -0400
>To: "S. Allen" <sallen3663@gmail.com>
>From: Paul Osborne <paul@ece.rochester.edu>
>Subject: Burning Rich HElp
>Cc: Paul Osborne <paul@ece.rochester.edu>
>
>Hello, I'm having a rich running problem with a 74 BGT ,18V desmoged
>engine ,HIF carbs, pertronix ignition,
>reasent valve job, and new rings. engine has 90K miles runs strong.
>Engine starts with no problem warms up,
>running though it burns rich. Black soot on plugs, same in the
>exhaust pipe,and rather high fuel consumtiom.
>Idle seem ok. Have tried a color tune and seems to be right on. I
>have been working on British autos for 40yrs
>and just can not figure this one out. Any thoughts?????
>
>
>--
>Paul Osborne
>University of Rochester
>Engineering & Technical Services
>Department of Electrical and Computer Engineering
>201 Hopeman Bldg River Campus
>Rochester, New York 14627
>716-275-5226
>paul@ece.rochester.edu
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