Hello everyone,
     I finally finished installing my new motor.  After setting the plug gap
and timing the engine I took it out for a test run.  At first it ran well,
but after a few minutes, It started running rough.  The engine was producing
quite a bit of black smoke.  This is a new problem.  Prior to the new
engine, I had no problem with mixture.  After refueling the van, I started
it and it ran perfect.  At least for about 5 minutes.  Then the rich running
condition returned.  I have tried disconnecting the O2 sensor.  It has the
effect of making it run even richer.  The problem exists at all engine
speeds and loads.  I tried to set the air/fuel mixture as per Bentley.  The
original settings appear to be the best.  Moving the screws only makes the
problem worse or has no effect.
     I have found that if the ignition is switched of and then restarted.
The problem goes away for about 5 minutes.  This leads me to believe it is a
sensor problem and not an injector or regulator problem.
     I tried to search the archives, but the search function would not work.
I searched manually and didn't find a solution.  I would appreciate any help
the list might offer.
     It really felt good to drive my van again.
Colin Moran
'86 Syncro GL
Beebe AR
The "Bronze Brick"
Alive and well