Regen,soot load,aftertreatment injector issues
08-23-2016, (Subject: Regen,soot load,aftertreatment injector issues ) 
Post: #1
Regen,soot load,aftertreatment injector issues
Having trouble with this 2012 kenworth t800, cm2250

Performed egr tune up, went through and cleaned every sensor, and replaced a few that cant be cleaned. After treatment diesel injector has been recently replaced. The doc and dpf filter have been recently cleaned.
Also the differential psi sensor has been replaced, egr cooler replaced Truck passes the cyl cut out test.

After the truck finishes regen, throws a particulate trap 1 psi code. The soot load is all over the place. Let me give a brief description of what I watched on insite when I took the truck on a 1 1/2 hour ride.

This last forced regen all the readings looked good, truck came out of regen, soot load before regen was over 4.5oz.

So it do pretrip quick on truck, and preceded to leave the yard. Soot load was reading 0 at this point. Truck was still hot from the regen, so I get out on the highway and got the truck up to speed and like the flip of a switch soot load jumped right back up to around 4oz, so im like wtf... Got about 8 miles down the road and I watched it start performing a passive regen, temps got nice and hot and I watched the soot load start dropping. Nice... Kept driving eventually I looked harder at my list of parameters, and noticed the aftertreatment diesel injector status said "open" wtf are you serious im thinking... So about 1 hour in I stop at the fuel island, and at this point no cel and soot load is 0 aftertreatment injector status was "closed"

Filled up truck, looked at my parameters, everything is looking great. I proceed to leave the truck stop and I didn't even make it to 3rd or 4th gear. Bam cel light, its asking for a regen I look over and the soot load was well past the 6oz mark, so I make it onto highway and get rolling and the red stop engine light came on, derated to 1500rpm

I had differential pressure codes, my laptop died shortly after this. Lol wtf.

This truck does need a turbo since it coughs pretty bad during regens, I actually heard it coughing driving down the road.

But how can the soot load jump so high immediately, its not a gradual rise, its in seconds.

Could this issue somehow be something faulty electronic side, giving the ecm false data???
I cant imagine the turbo dumping oil into the dpf filter that fast.

I need some help/opinions on what next to do

This truck, I want to burn it down!!

I will edit in some screen shots of the numbers during regen and also when I was driving down the road
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Messages In This Thread
Regen,soot load,aftertreatment injector issues - joed2323 - 08-23-2016



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