If there was violent jerking after some serious bumps, it is likely that
you have a loose or bad connection somewhere in the FI or ignition
systems that is breaking contact on the bumps.   Check all of them but
one that is often overlooked is the connection on the side of the
distributor coming from the Hall Sensor.  Remote grounds like the one on
the tranny, or from the negative terminal of the battery can be the
cause of these symptoms.  Pay attention to the ones on top of the engine
and on the left side of the engine bay beneath the coil.

--
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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