The owners manual does say to press the pedal to the floor and release when cold. Have to believe this either sets a fast idle or advances the pump timing. I have to say that I don't take alot of stock in the manual, I had a 80 300d with idle advance on the dash, the manual stated in temos below 32F press the pedal to the floor 2-3 times before starting. I have repaired truck diesels for years and have no idea what they think this does?

I cant believe you have to manually hold the idle up.