2019 Duramax Regen

deltabravo wrote:

ktmrfs wrote:
duramax will also go to high idle in neutral during a cold start on cold days to help warmup. RPM will go to somewhere between 800-1000 IIRC, grid heater stays on, turbo goes to max backpressure and throttle valve is activated. All this to help warm up.

Doesn't the high idle only engage if you have the setting turn on in the DIC?

On my 2009, elevated idle has to be enabled in the DIC before it engages at the OAT temp that causes it to engage

Now that you mention it I think you are correct that it is a DIC setting. And default was not enabled. If so I changed mine. Been 5 years ago.......

I know on my 2004.5 there is a high idle on cold temp start setting that was an option that was enabled either through the DIC or if you didn't have the DIC readout through a set of steps you did once on a start.

On both trucks depending on how cold it is, the step from normal to high idle may take a minute or so, the colder it is, the longer it takes.

Also my 2015.5 came with the optional two stage high idle that can be engaged with the cruise control. but that high idle does not do much to help warmup, just up the idle for charging, plowing etc. when in neutral.

deltabravo wrote:

S Davis wrote:
I keep an eye on my soot level and if I am getting up there and driving more than 30 minutes I will force a regen.

How does a person "force" the truck to regen?
What year is your truck?

Truck is a 2019 Chevy and my Edge CS2 gauge will initiate a regen.

ktmrfs wrote:
duramax will also go to high idle in neutral during a cold start on cold days to help warmup. RPM will go to somewhere between 800-1000 IIRC, grid heater stays on, turbo goes to max backpressure and throttle valve is activated. All this to help warm up.

Doesn't the high idle only engage if you have the setting turn on in the DIC?

On my 2009, elevated idle has to be enabled in the DIC before it engages at the OAT temp that causes it to engage

S Davis wrote:
I keep an eye on my soot level and if I am getting up there and driving more than 30 minutes I will force a regen.

How does a person "force" the truck to regen?
What year is your truck?

RobWNY wrote:
This thread has been interesting and a learning experience for me. My 2020 Duramax and first diesel vehicle was idling high yesterday. I thought it was too warm outside for it to be idling higher than normal. Now I understand why! Thanks for teaching this old guy something :)

duramax will also go to high idle in neutral during a cold start on cold days to help warmup. RPM will go to somewhere between 800-1000 IIRC, grid heater stays on, turbo goes to max backpressure and throttle valve is activated. All this to help warm up.

My 2015.5 warms up from cold WAY faster than my 2004.5

NRALIFR wrote:

4x4ord wrote:
When Ford starts a regen that gets interrupted the regen is canceled till the filter reaches 100% full before initiating another attempt.............

That’s the way mine works, and there have been a few trips that just weren’t allowing a full regen to occur. It’s maddening to see that happen several times in a row. I wish when the DPF gets above about 80% soot load, it would allow you to start a manual regen. There have been too many times that if the ECM would just start the regen at the beginning of a short trip, it would have plenty of time to finish by the time I reach the destination. Instead, it seems to wait until just a few minutes before I get to where I’m going. Then it only has time to burn off about 10% of the soot.

:):)

If you have a Chevy you can use a Edge CS or CTS to monitor and initiate a regen, I have soot level, miles since last regen, as well as exhaust temperatures. It will also data log and read and clear Codes. I keep an eye on my soot level and if I am getting up there and driving more than 30 minutes I will force a regen.

To the op,

I would give it a regen or two before getting too worked up, I have had my Edge CS monitor since the truck was new and would get between 450-500 miles between regens depending on driving. I had an unfortunate issue when a drill bit got away from me and I ended up with a hole through my airbag module, I took it in to the dealer for that and they did the update for the regen cycle while it was there.

My next regen cycle didn’t even go 300 miles and the one after that about 400 miles, I went back to the dealer and complained to the service manager and was told nothing they could do. Since then I have gotten up to 720 miles between regens and it usually is around 650 plus or minus a few miles.

I think as mentioned above it needs to get some running data before things even out.

This thread has been interesting and a learning experience for me. My 2020 Duramax and first diesel vehicle was idling high yesterday. I thought it was too warm outside for it to be idling higher than normal. Now I understand why! Thanks for teaching this old guy something :)

4x4ord wrote:
When Ford starts a regen that gets interrupted the regen is canceled till the filter reaches 100% full before initiating another attempt.............

That’s the way mine works, and there have been a few trips that just weren’t allowing a full regen to occur. It’s maddening to see that happen several times in a row. I wish when the DPF gets above about 80% soot load, it would allow you to start a manual regen. There have been too many times that if the ECM would just start the regen at the beginning of a short trip, it would have plenty of time to finish by the time I reach the destination. Instead, it seems to wait until just a few minutes before I get to where I’m going. Then it only has time to burn off about 10% of the soot.

:):)

I had my 2019 updated and can't say it has effected it negatively at all. It seems like about every tank of fuel it goes into regen mode. The regens on my 2019 seems shorter than my old 2013 Chevy I had.

Dan