Steve,

Actually, I don't think those symptoms are the classic "Vanagon
Syndrome" that is due to a bad spot in the AFM tracks.  That happens at
steady speed highway driving when the head of meter sits over the worn
spot steadily and therefore give erratic signals to the ECU causing it
to cut out.

If your problem happens at idle, it is most likely something else.
Attached is a zipped set of files written by list member Mark Keller
that together provide for a systematic diagnosis of Fuel Injection
system problem that impair engine performance.

Also included is zipped set of files by list member Dennis Haynes about
the fuel injection system primarily focusing on the O2 sensor and how to
tell if it is causing your problems.

Regardless of what I think, these files will allow you to precede
systematically.  You have already gotten a good start by checking
grounds.  Many times a bad ground or two are the source of a problem
something like this.  Did you check the grounds at the battery and from
the transmission to the frame, fuel pump to frame?

On top of all of that, try making sure that the connection from the Hall
sender to the side of the distributor is nice and tight.  Just a hunch,
but it takes 5 seconds to try it.  Also check idle stabilizer in the
space behind the right rear taillight assembly.

Sam

--
Sam Walters
Baltimore, MD

89 Syncro GL, Zetec Inside
85 Westy Weekender
85 Mercedes Benz 300D Turbodiesel - to become veggie oil powered

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