LMM DPF regen

[mario430]

Let me start with this I'm in Phoenix AZ so I can't delete my DPF due to emissions.

I have 08 LMM CCSB, I'm having an issue where my truck is going into regen anywhere from as low as 60 -120 miles. I've been reading that short trips might be the cause but what is the definition or short trips? This is my daily driver to work and that is 18 miles each way. one the way into work I easily hit 80 on the way home hit 70 usually if not more but I do also hit traffic slows down to 30 for about 1 mile then 2 miles of surface driving with lights. Because of the type of driving I do should I drive it harder would that help with the DPF getting hotter and maybe not regen as much? Normal driiving my sensors are 470 before DPF and 510 after DPF. Also when driving 65 and its in regen mode I'm hitting 1250 on the sensor after the DPF is that too high?

Something else I was thinking was could it be the fuel that I am using?
This all started when I took long road trip and before the trip I used some SeaFoam in my tank could that be the cause? I used 1 can per tank full which is 1/2 - 3/4 strength according to directions?

 

[coker6303]

looks at the soot build up, should be in grams if you look at your scan tool. I don't remember the PID

 

[mario430]

ok question on the PID I've been trying to find a list of PID's but I can't find anything out there does anyone have a list by chance?

 

[mario430]

Question for LMM owners only. If you use some type of cleaning additive being lucas or seafoam or keen diesel or anything have you seen the Truck to do more regenerations? I've switched over to keen Diesel since that is what seemed to be recommended and my truck is regenerating once ever week about 140 miles inbetween. When I didn't have any additives in the tank I was doing a regen at about 370 miles.

 

[msjdgman]

I've used Diesel Kleen for years now and never had an issue with the regens that I've noticed. Most all of the miles over the last 3 years have been towing though. But I still haven't noticed anything out of the ordinary.

 

[NC-smokinlmm]

How many miles are on the truck?

 

[IronDX]

When I had a LMM, my truck would regen twice per tank full. When I quit using it, it returned to once per tank full. Like normal.

 

[mario430]

How many miles are on the truck?

I'm at 148K

 

[NC-smokinlmm]

It sounds lie it might need a forced regen, do you have access to a PPE programmer or tech2?

 

[BlackHillsHD]

Has the truck ever had a set of injectors? I have seen them start to leak a little and cause the soot load to build up premature.

 

[swaggerstick]

Regen

I have a 2015 stock lml. It has 4000 miles on it. I have never seen a regen message. I have been told by the dealer that it is probably doing light cleanings and not to be concerned. If that is the case they say I may not get a message. Does this make sense? I did get a add def at about 1600 miles. I put 3 gallon in it then. The dealer said it will probably give me the need def message at about 6000 miles. It is hard to get a definite answer. The book doesn't seem very clear about it.

 

[BlackHillsHD]

The def system has a lot of variables. The biggest thing I have seen is to make sure that you fill it with the key off. If not, it can sometimes cause issues with the level sensor.

 

[redws6rocket]

You might check over the truck, air filter in good shape? Any charge air system leaks, exhaust leaks? That is perfectly normal for the egt sensors to get 1200-1300 degrees during regen. Does the truck blow out any black smoke, is inside the tip black?

 

[NC-smokinlmm]

I have a 2015 stock lml. It has 4000 miles on it. I have never seen a regen message. I have been told by the dealer that it is probably doing light cleanings and not to be concerned. If that is the case they say I may not get a message. Does this make sense? I did get a add def at about 1600 miles. I put 3 gallon in it then. The dealer said it will probably give me the need def message at about 6000 miles. It is hard to get a definite answer. The book doesn't seem very clear about it.

There s no light indicating a regen, if your using def it's cleaning itself. It amazes me how litte some dealers actually know about these trucks...

 

[swaggerstick]

I think the 2015 Trucks show a Text message in the DIC saying that it is regenerating. At least that is what the book says. Don't think there is a light. I did find out there is a recall on "Power Steering Hose Clamps Inspection" And " They had to re program my puter because there is a glitch in "Something about racking up undriven miles on the Odometer" Not sure that one is a good description of the problem.

 

[NC-smokinlmm]

I think the 2015 Trucks show a Text message in the DIC saying that it is regenerating. At least that is what the book says. Don't think there is a light. I did find out there is a recall on "Power Steering Hose Clamps Inspection" And " They had to re program my puter because there is a glitch in "Something about racking up undriven miles on the Odometer" Not sure that one is a good description of the problem.

No they don't. Look in my sig...

I got the 2 recall notices in 2 days, one for power steering and another for harness chafing...

 

[mario430]

You might check over the truck, air filter in good shape? Any charge air system leaks, exhaust leaks? That is perfectly normal for the egt sensors to get 1200-1300 degrees during regen. Does the truck blow out any black smoke, is inside the tip black?

Airfilter is in good shape replaced with ACdelco 2 months ago

Not sure where to check for or how to check Charge Air system leaks or exhaust any advice on this would be awesome.

Truck does not blow out black smoke its clear. Inside is black but through that was normal?