Regeneration

[John Pettinato]

Hello
I am new to this forum, I have a 2011 3500 dually with a 6.7 L motor. The other day while climbing a hill I got a notice DPF was 90% clogged and truck started regeneration mode. Barely made it up the hill, smoking , no power etc. drove it home and checked codes. Deleted all but three and message on dash says to bring truck to dealership. I drove it today and seems to drive ok , power etc. These codes appear permanent. Really not a fan of dealerships, any advice ?

 

[MADDOG]

Try taking it out and hammering it hard up a freeway. Basically you are trying to "blow out" the DPF system. Warm up that truck and try raising the exhaust gas temperature. It may take 5 - 10 minute of hard running to clean it out.

Remember blowing out carbon from a carb in your car back in the day? Same principle.

The codes are not permanent and, if the fault doesn't occur for 3 - 5 key cycles (on/start/drive/stop/off) it should disappear. If it doesn't, a visit to the dealer would be prudent.

I don't know if the filter is serviceable on your truck but some folks have removed and cleaned them with air or high pressure water.

 

[mtnrider]

Sometimes (most of the time) those messages go away on their own but if not you may end up at a dealer.

Like Maddog said get out and get that thing hot. In my experience monitoring the EGT temps and DPF filter levels (I have a app that I can monitor those) just running it on the highway may not be enough. Need to put some weight on it. Do you have a good heavy trailer you can hook up and tow on the highway for a little while? That should get the exhaust temps good and hot

.

 

[Firebird]

If all is working properly, it takes about 20 minutes at freeway speeds to clear it out. It will count down on the EVIC so you can see the progress

 

[crash68]

If the warning states that the DPF % is at or above 90%, you probably will have to take it to the dealer for a forced regen.
Like mtnrider stated, you need to put that thing under a good load. I was recently pulling an 8K lbs trailer behind my EcoD and with the EGT staying above 1000°F, the DPF % went down without doing an active regen.

 

[John Pettinato]

Ok, good advice, I’ll run it on the highway hard up a steep section here in Vermont.
What are your thoughts about putting in a delete kit?
My friend went that route and is getting 4 mpg better than me.

 

[Firebird]

Pre-DEF trucks like yours benefit greatly from deletes

 

[John Pettinato]

I purchased a PPEI delete kit, won’t install it until a schedule recall notice is corrected. I did take truck out on hilly freeway and pushed it hard but after 40 min was still getting notice that DPF is at 90%. I’ll just remove that crap and go from there.