William,

Attached is a zip file that contains numerous files about diagnosing
fuel injection problems in the WBX engine, particularly the 2.1 l engine.

New plugs, wires, cap, rotor, etc., almost never solve this type of
problem, but people who don't know how to diagnose the problems throw
the parts at the customer's van for a start.

Often the problem can be as simple as a bad wire or one or more dirty
grounds.  These cause incorrect information to get to the ECU.   Other
times something such as the O2 sensor needs to be replaced, but there
are ways to test this rather than just going out and buying new parts.
(Disconnect the 02 sensor and run for a few days and see if the problem
goes away.  Running without it is OK.)

These files will explain how to systematically go through the possible
causes and eliminate them one by one.

List member Mark Keller wrote these files

--
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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