[T3] running rich and mystery material

Dave rdavid at rochester.rr.com
Fri Nov 9 18:10:23 PST 2012


Hello Dennis. As far as your running rich issue - I would agree with
Adriel's comments;

 

-          Check the cold and warm resistance on your 2 temp. sensors. If
they are not sending the correct resistance to the brain, then the brain
will think you are running hotter or colder that it really is..maybe
creating a too rich mixture for the real operating temp. of the motor.

 

-          Is certainly sounds like your AAR is not working because you have
no increased idle speed when cold. It is not supposed  a large increase in
cold idle speed, but it will be higher than when the motor is warm. The
brain is supposed to make the mixture a little richer when cold (like a
choke on a carbed car), and the AAR is supposed to supply extra air into the
IAR that will provide more air to the cylinders when the motor is cold and
the mixture is richer. The extra air combined with the richer mixture
results in a higher than normal idle speed. Your video shows no indication
that your idle speed is compensated for when this richer mixture occurs when
cold.

 

 

Dave Pallo

'72 Square ~ Elwood

Fairport, NY

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.vwtype3.org/private.cgi/type3-vwtype3.org/attachments/20121109/2f7315e4/attachment.htm>



More information about the type3-vwtype3.org mailing list