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Old February 13th, 2015, 16:52   #11
meerschm
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Join Date: Apr 2009
Location: Fairfax county VA
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Keep in mind that the increase in temperature of the DPF is not because the exhaust is hotter, it is because the exhaust has extra fuel injected late in the cycle, which is then oxidized in the converter just prior to the DPF.

the fan that runs allows air to pass around the Converter/dpf to carry off some of this heat.

650 c is kind of warm.
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