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Most egr valves are closed until the engine comes up to operating tempture. You don't want a lean mix prior to normal temps, however I could be wrong?
good articile, I forgot about the heat from egr valve and stand corrected. Ecu would no doubt increase fuel flow to enrich mixture.This is a great article on the EGR/Powerstroke: http://www.drivingline.com/articles/egr-diesels-necessary-evil/
I believe you are correct, the OP may have several things contributing to his issues.good articile, I forgot about the heat from egr valve and stand corrected. Ecu would no doubt increase fuel flow to enrich mixture.