Did you check the Temp II sensor in the thermostat housing?  The Bentley
manual tells you how to check the resistance of it.  It controls the cold
start enrichment and if it is dead, the engine will get cold start
enrichment all the time.  I had that happen on my 92 Jetta Digifant.  It
does make it hard to start when the engine is hot, though.  You flood the
plugs.
Tom Miller

----- Original Message -----
From: "Kurt Camealy" <camealy@CTSR.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, January 22, 2004 9:18 PM
Subject: Rebuilt 2.1 Running Rich

I have a rebuilt 2.1 in my 87 GL Wolfy that is running rich.  I don't seem
to have any problems other than poor mileage.  It has about 8000 miles on it
and gets only 15 miles to the gallon mix city/highway.  I starts up great
cold or warm, has good power for a waterboxer, and doesn't stumble.  The
tailpipe is dark black and sooty water drips out of the tailpipe during
idle.  It also burns oil at about 1 quart per thousand miles.  I don't know
what to do about the rich running.  The whole engine was a top notch rebuild
job and has new plugs, wires, O2 sensor, no vacuum leaks, and has the timing
set accurately.

I am seem to get a swing with a .5 volt center on my o2 senser at idle so I
don't know what the problem is.

Thanks for any assistance you all can offer.  I used to get 19-20 miles per
gallon with 150,000 miles on the engine.