Regen question. - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-25-2013, 03:36 AM Thread Starter
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Regen question.

New truck with 215 miles on it, get a console msg, exhaust filter cleaning. Mpg while cruise set went from 20.4 to 13. I thought the DEF handled that. And at 200 miles? 12 6.7 3.55 stock
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post #2 of 5 Old 04-25-2013, 04:12 AM
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Mine did it around the same mileage as well. Now I'm at 600 miles and lots of stop and go and it hasn't done it yet.
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post #3 of 5 Old 04-25-2013, 05:28 AM
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I've got almost 10k on mine and I've noticed a lot more regens with mostly city driving. You'll see your MPG decrease for a while after every regen also.


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post #4 of 5 Old 04-25-2013, 01:43 PM
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Regeneration is the act of "burning out" the particulates caught in the diesel particulate filter. Your engine pumps fuel in the exhaust stroke and raises exhaust temperatures to burn out the particulates that would otherwise simply go into the atmosphere. Thus, when the DPF is sensed as requiring cleaning, you use more fuel to burn it out.

Your truck uses diesel exhaust fluid (DEF) as part of selective catalytic reduction. The urea (DEF) is dosed into the exhaust stream to reduce nitrogen oxide (NOx). Check out this for some details.

http://media.ford.com/images/10031/S...rtreatment.pdf

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post #5 of 5 Old 04-25-2013, 03:58 PM Thread Starter
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Great link. Thanks. Glad I am some what versed in chemistry. I'm kind of glad these new engines have this system, saw an older truck stomp on it and it bellowed black smoke like a locomotive. I thought to myself how obnoxious and the back of his truck was filthy.
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