RE: DML-Running rich

[wingd2@xxxx]

 (This has been submitted by David, just in a round about way. He's presently 
having some difficulties with his computer)


To run rich enough that the catalytic converter glows red means
that you are running way too rich. Among the causes are the following:
a way too rich adjustment of the mixture screw
a misfiring cylinder(bad wire, plug, etc)
timming way off (not a couple of degrees)
a leaking (stuck open) freq valve
a leaking or stuck open cold start valve (check the plug on the
cold
start valve to see if you mixed it up with any other)
a malfunctioning cold start system (always on)
You need to find out how you are dumping all of that fuel into the
exhaust. Maybe a burnt exhaust valve? See if all of the cylinders
have compression. Not likely if you say the engine runs good. You
should hear a loud buzzing coming from the right side valve cover
like an angry cricket. If you don't then check the lamda system and
the frequency valve.Generaly it will fail shut, maybe it is stuck
open. Do not operate the car for an extended time until you can keep
the catalytic converter from glowing. Don't replace the oxygen
sensor
just yet. To remove it you may have to try the old "smoke wrench"
an
acetylene torch to heat it up to loosen it. While you are at it
remove and replace the test port plugs on the exhaust pipes, there
are
two. When you replace these and the o2 sensor use some high temp
anti-lock compound just don't get it on the sensor probe and always
use "SENSOR SAFE" silicone compound on the engine or you will
continually contaminate the O2 sensor. Make sure the micro switches
on
the throttle spool are all working both in the idle position and at
Wide Open Throttle (WOT). At WOT the lambda system goes full on and
at idle the idle motor is on. (Long post but a lot of things to
check)

David Teitelbaum
vin 10757




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