thanks for the reply mark. the car has 195K mi on it and i want to do this as preventive maintenance- no apparent problems with the car. my practice has been to do a DP and change the air filter, run a tank of fuel, and then change the oil. I just want to have a good maintenance baseline.

EDIT: found the procedure- sorry for the interruption
http://www.peachparts.com/shopforum/showthread.php?t=113596&highlight=diesel+purge