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AS a further note. Regeneration is most likely to occur at speeds of 35 MPH and below. I do not recall ever having a "high speed" regeneration although we are told they can occur.Most of the symptoms I describe above took place while towing our 3400 in slow or city conditions where the effects of regeneration are pronounced. The tail pipe pictured should always be clean and any trace of soot in the tail pipe is a indication of a malfunctioning DPF.We had a solo regeneration the other day here in the city that lasted only about 10 mins and would not have been noticable if I had not noted the EGT temps rise from @ 500 degrees to 1000/1100 degrees. We dialed in the MPG O meter and noted a 5MPG drop during the regen cycle.. I agree that over the long run it will have little effect on over all MPG. Steve, having a $%#&&*^ Cummins will get much better MPG that these fine Fords and the regen effects may be less noticable..
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