Jay,

The O2 sensor is a good place to start, but it is best to be systematic
and not proceed based on guess work.

Attached is a set of files that have a rather complete explanation of
how the fuel injection system works and how to diagnose and trouble
shoot the system.  They were written by list member Mark Keller.

Also attached are some files written by several other well informed list
members that focus on the O2 sensor.

Sam Walters

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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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