Wow! Deja Vous! I just mentioned in another thread that I think most of the regen problems are associated with the use of non ULSD fuel, either intentionally or unintentionally.
But to another point, why in the world is everyone letting the truck sit during regen? It is just that much more fuel you have to burn to get to the high temp needed. If I am correct, Ford designed this system to be used while running down the road and even if you interupt it, it will still pick up later. Using the truck will probably get you most of the temperature needed, versus getting zero miles to the galon while sitting in your driveway.
Also, there is also a lot of confusion about the Ford mileage calculator. It is unbelievably accurate in my opinion. Just keep in mind it is measuring mileage over time. If you just reset it, it is instantaneously showing your mileavge for that brief period, and from that point forward the average over that amount of time since you reset it. So sitting in your driveway yields zero miles to the gallon. Setting it going down hill yields a sweet 30 miles per gallon which is true. Sitting in your driveway for 30 minutes and then driving for only 10 miles will show you very dissappointing mileage because that 2/3rds of a gallon you used for the 10 miles has to be averaged in with the 2/3rds gallon you used idling for 30 minutes which gives you about half the mileage rate. And obviously filling the tank and calculating manually also leaves a lot to be desired if you can get swings of 6 gallons still missing when it says full and clicks the handle. I see nothing for alarm here regarding mileage that didn't already exist in my 2006 6.0 and look forward to the same or better when my 6.4 arrives.
Tommpa. I was at 7springs this weekend and saw a truck that fits your description with soot on the exhaust tip. Probably just a coincidence but still worth mentioning.
Along the road to the upper parking lot? That is the one I saw. I was freezing and dead tired but I was sure that tip looked to be black with soot. If the dealer can't find anything I'd check it out for sure.
Yeah there should never be any visible soot in the exhaust pipes. If that really is soot, then you have a cracked DPF. Couldn't see the front of your truck but do you have the winter cover?
The truck finally fired up an active regen after going through 4 tanks of ULSD 15ppm Exxon diesel fuel. Not too bad, especially since most of my driving has been around town, with limited hwy. driving. Three weeks have passed since my last noticeable active regen.
I just pulled into the driveway a little while ago, and as soon as I placed the truck in park - up went the RPM's to 1,200. "The Cake Was Baking In The Oven!"
Great thing was that the regen only lasted for about 8 minutes total. As soon as the regen ended, the engine belched out a light but healthy-sounding growl, then idled itself back down to normal engine idle speed.
The neighbor saw me outside, and asked me why the engine was idling high, I told him that it is doing its part to make the liberals happy.
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