My system has zero issues. Works 100% reliably at all times. My disgust with it comes in fuel economy. I can drive my truck for a few days and put a few hundred miles on it and the MPG display on the dash will show very nice numbers. Maybe I'm seeing 18 to 19 MPG. But as soon as the truck goes into regen mode the fuel economy starts dropping like a rock. I can watch the meter fall as I'm driving. My average MPG will decrease as much as 1.5 by the time regen shuts off. The reason the long term MPG is so low on these modern diesels is because the regen events ruin it. Occasionally the timing works out to where I get hit with two regen events over the course of the same tank of fuel. Those numbers come out really bad...down into the low teens. It's ridiculous.
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- Thread starter jetrinka
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There’s unfortunately no way around the momentary fuel economy dive. The truck is pumping fuel into the exhaust stream to accomplish the task of increasing DPF temperatures for regeneration. When that happens, fuel is being consumed for a task other than propelling the truck forward. If everything is working properly and you’re using the truck adequately, you should be able to go 900-1000 miles (or 24 engine hours) between regeneration cycles. One 20 minute regenerations cycle in 24 engine hours wouldn’t have that significant an impact on overall fuel economy. Its when the truck is repeatedly regenerating that it drags your overall fuel economy down.
Great White North Eh
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Saving the environment by burning (wasting) more fuel every regen! I always thought 1+1=2. But when it’s math funded by enviro backed government no answers end in a simple 2 I guess.
Firebird
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Sadly, my 3500 couldn't make 100 miles between regens, and dealer was clueless as to how to fix it.
That seems to be a common theme. Sadly.
KaoticDually
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Crazy. My truck won’t even regen. Over the past 3 months I’ve been getting “Exhaust system service required See Dealer” and I’ve been taking it back each time and it seems as if all they’re doing is forcing it to regen and not actually fixing the issue.
When that message appears on the instrument cluster, does the MIL (check engine light) illuminate too?
Anytime you see “exhaust system service required see dealer” the truck is deactivating the active regeneration function due to a fault in one of the systems. Quite often it’s either a faulty sensor (likely an EGT sensor) or a fuel delivery issue.