I looked in the owners manual about the whole process but I'm still a lil confused.

They say it will tell you when it wants to clean the filter. You can tell it not to do it or you can select ok to let it do it.

If you keep saying no it will diminish the power and all that stuff.. Or maybe im confused with the DEF fluid as for the engine power.

In any case I have seen the clean exhaust filter message come up a few times and I think I have only gone thru one full blown regen and a few passive ones towing my landscape trailer or equipment trailer.

When I picked the truck up from the dealer it had 440miles on it now its got 2400 miles on it. The full blown regen took place at the 1870 mile mark as it sounded a little bit different and the fuel consumption was ginormous and it took like a good 3/4's of an hour or more for it to complete its task. I didn't want to stop the process so I let the truck idle while we were stopped for a quick job.

The clean filter message came on today while I was driving and of course almost at my destination but as quick as it came on it went away also.. So im a little puzzled at what the owners manual says vs what the truck is doing.

 

I noticed it doesn't STAY on during the process, it just flashes the message on screen for a few seconds and you just know because the exhaust sounds different and the fuel economy drops. If you shut off the engine before it's done it will just start doing regen the next time you operate it once it is at normal operating temperatures. I haven't had a parked active regen (which apparently is supposed to give you a yes/no prompt on screen). I thought a passive regen was when the PCM did not have to step in, or show you a message; the cleaning activity would just happen as you drove the vehicle.

So my question now is do I drive it more aggressively to raise temperatures or do I drive gently so it creates less soot that the filter has to deal with?

 

There will be a "cleaning exhaust filter" message for 2-3 seconds.
You'll miss most of them.

With the 6.7L, you don't loose power or I sure haven't noticed power loss during a regen.
As you increase in mileage, I think the regens become more "harsh" because I hear the engine making different noises during a regen but I hardly noticed regens for the first 10,000 miles.

DEF is fighting NOx.
It's part of the same emission system but isn't directly involved with a regen.

You won't notice passive regens. Those happen in the background.
If temps are high enough, it will clean up some of the soot.
The reason for active regens is temps aren't high enough often enough thus creating the need to force high temps.

Active regens last for about 10-15 minutes from what I've noticed.
The regen process actually begins 30 seconds prior to displaying the message and the DPF continues to clean for several minutes after the computer stops the regen process but exhaust temps remain hot enough to continue reducing the soot count for another 5 minutes or so.

The regen will turn itself off if the transmission is in park for several minutes.
At one point I said SEIC allowed regen but now I know it turns off but if temps are high enough while high idling, the soot count does drop.
If the regen started within a few miles, idling doesn't do much from what I've noticed.

Yes, regens normally happen at the most inconvenient times.
I can be driving 55-65 MPH for a half hour and then it starts when I turn into the subdivision or the parking lot at work.

 

I think my truck was stuck in passive regen mode for the whole tank last week. Consumption was up there this week it's dropped. Im sure I tanked up at the same fuel station. However this time the tanker truck was filling the tanks at the station and he was filling the tanks on his truck at the same time..

 

Driving more aggressively will create more soot.
If I have an active regen on a 45 MPH or less road, I do lock out 6th gear but other than that, just drive it.
Watch your instant fuel economy screen and you can get an idea when it's done.

With the pickup models, you do not have control over the regen process; parked or driving.
Well, you can shut the truck off so you do have a little control.

It depends how much it cleaned before the engine shut down.
If the soot count is still at or above 2.66 at next start, it will begin once the engine is warm.
If it cleaned down to 2.40 for example, it will be awhile before it starts again.

 

There will be a "cleaning exhaust filter" message for 2-3 seconds.
You'll miss most of them.

Yea I have seen that a few times. I think I even saw it once when I was sitting in my driveing way playing with the LCD display in the middle of the cluster.

With the 6.7L, you don't loose power or I sure haven't noticed power loss during a regen.
As you increase in mileage, I think the regens become more "harsh" because I hear the engine making different noises during a regen but I hardly noticed regens for the first 10,000 miles.

I guess as such in life they get dirty'r with age. LOL.

DEF is fighting NOx.
It's part of the same emission system but isn't directly involved with a regen.

Does it not inject that fluid when doing the regen or is it injecting it at all times to help fight that?

You won't notice passive regens. Those happen in the background.
If temps are high enough, it will clean up some of the soot.
The reason for active regens is temps aren't high enough often enough thus creating the need to force high temps.

Regens last for about 10-15 minutes from what I've noticed.
The regen process actually begins 30 seconds prior to displaying the message and the DPF continues to clean for several minutes after the computer stops the regen process but exhaust temps remain hot enough to continue reducing the soot count for another 5 minutes or so.

The regen will turn itself off if the transmission is in park for several minutes.
At one point I said SEIC allowed regen but now I know it turns off but if temps are high enough while high idling, the soot count does drop.
If the regen started within a few miles, idling doesn't do much from what I've noticed.

Well thats weird as I was hauling my fullay loaded 7' x 18' enclosed trailer on the Hiway for 30 min doing 100km thats prob 60 or 70mph. If that dont get it hot then I duno what does. I parked it and it kept sucking the fuel back like no tomorrow.

Yes, regens normally happen at the most inconvenient times.
I can be driving 55-65 MPH for a half hour and then it starts when I turn into the subdivision or the parking lot at work.

 

Get some kind of display that will show the PIDs that the computer is tracking. My EDGE CTS shows the Soot Particulate count and I know that I will start regen at certain count levels. So you can not only see when you are regen'ing, but have some kind of forecast as to when it might regen. I can also see that highway driving at 65-75 mpg is one of the fastest ways to accumulate soot. Hence I know I regen much more often driving the hiway between home and Salt Lake, than I do dragging my horse trailer up over the mountain.

 

I guess to sum it up you use fuel either way its just which uses it more. I'm considering the edge insight to monitor stuff. I had a bullydog on my cummins they both caused me allot of grief.

Where would you install a pyrometer on these 6.7l truck. Pre turbo postt turbo but before the dpf and then another one past the dpf? Don't do allot of higway miles luckly.

 

Seems like locking out 6th gear would make the engine spin faster but work less since you are in a lower gear? Less work would mean lower exhaust temps given all other driving conditions are equal.

 

More RPM = more heat in most conditions. In this case since extra fuel is injected in the exhaust stroke to be burnt off in the catalyst, more RPM = more fuel = more heat.

Grassman09, the truck already has several locations that it reads EGT. It is virtually impossible to install a probe pre-turbo on this motor without an EGR delete or substantial disassembly of the engine.

 

Not to beat a dead horse, but when towing, everytime I needed to lower my coolant and exhaust temps, I dropped a gear.

And since it's an injector, the PCM/ECM can control the amount of fuel dumped to the exhaust regardless of RPM.

 

Well it looks like you have it all figured out so there is no need to explain further.

 

Ford already has 4 pyros in your exhaust system that are currently monitoring your EGT's. The Edge will display any of those. They are all POST turbo, So you need to understand you won't see temps as high as we used to see pre turbo on our 6.0 and 7.3 trucks. I think getting a a Pyro installed pre turbo on this engine will be kinda of a challenge because of the center mounted turbo.

The Edge CTS is strickly a DISPLAY product. It will do no programing and should not cause you any problems. Just plug it in to the port under you dash, run the wire up your door jam under the rubber door seal, and apply the suction cup to the windshield. a 2 minute install and 30 second removel if it needs to come out.


The Edge CTS will display any data that the trucks computer is tracking from it's many sensors.. I'll bet there are at least 40 PIDs to choose from to have displayed on the screen. You can set it up to display 2, 3, 4, 5, or 8 items ( or PIDs as they are called) at the same time. You can have it display the corrected speed for larger tires, RPM, any of the EGTS, the Regen satus, Voltage, fuel usage, or level, DEF level ( it still displays the same gauge results as the dash, since it uses the same sending unit. Full, 1/2 full, almost empty)

As far as EGTs. You will notice that your egts will drop if you drop a gear and increase your RPMs. Temps are lower because you run more air thru the engine vs lugging it. RPMs are not what causes heat. Loading the engine up is what produces the heat. I learned that back with my 7.3L When ever my EGT climbed to high ( say when driving along I-70 with the cruise control on towing my horse trailer, at 70mph/ 2000 rpm with a slight uphill grade in highgear. Truck had the power to pull that grade, but EGT temps would climb to the red zone, Drop a gear, gain 500 rpm and temps would drop 400°)

So if you want to get more passive regens, It's not about higher RPMS. 70 mph at 1500 rpm in 6th gear with 20 lbs of boost produces more heat than 70 mph at 2000 rpm in 5th gear at 5 psi boost. Being under load. Acceleration, climbing grades, the type of things where the turbo boost builds and you have more air/fuel in the same piston stroke, create more heat..

 

Thx for the insight. So does it matter loaded or unloaded? How do you lock out a gear? Do you use more fuel by locking out a gear? Anyone running the Turbo timer I guess that would be just as hard to install as the EGT probe?

 

Ok, soot is a product of fuel. Throttle position controls the fuel delivery. If you are driving in such a way (heavy trailer) that you can increase throttle and virtually gain no speed, you are loading the engine well, making soot, generating high egt, and passive regen is probably happening all the time. I generally travel 700 miles or more with no active regen. The engine cannot get stuck in passive regen.