Haunted International DPF help

AlleeTaborn · Jul 12, 2019

sickntwisted said: ↑

Hello All,
I'm hoping someone can help don't know what to do.... I've searched everywhere and since this international isn't a cookie cutter problem there doesn't seem to be much help. Helping a friend out trucks been to 2 other shops and to the dealer 10+ times all they have managed to do is throw parts at it and hope for the best no one has figured it out YET...my friend is now so deep in the truck hed have to sell it for 3x what its worth to break even.. Here goes..
2011 international prostar rollback with the maxxforce 9, my friend said the dpf light would come one then go off, truck would require a lot of parked regens, power loss these problems would come and go he finally got to the point of knowing there was a huge problem when he notice the exhaust temp light stopped coming on during regens he said it would always come one durning a regen.
1. Pulled the DPF and DOC
DPF was cracked replaced DPF and baked the DOC they said the DOC flow tested at 95% after baking
Also the DOC WAS NOT face clogged
2. Inspected the pressure senor tubes at DPF lines are not clogged
3. After putting new DPF & DOF back on test drove truck and still had no power used our scan tool to check soot level scan tool said 150% so we did a forced regen noticed the temps weren't getting above 600
4. Pulled Dozer injector the Dozer and Hole the dozer mounts through were clogged cleaned dozer and blew it out with low pressure air dozer had a cone spray like it should cleaned out the exhaust pipe the dozer mounts in
5. Did .another forced regen temps did climb but only got up to 600 6.pulled truck 1/2 in shop stood wood up against cab on both sides with the shops turbo heater blowing on front of truck it wasn't that cold outside but we needed to get the temps to at least 1000 to cook the soot with the cab blocked in and the extra heat temps got to the low 900s
7. Did 3 forced regens with cab blocked in and soot level dropped to 11% (still shouldn't have to block the cab to get the temps up)
8. Since the soot was 11% the high soot load fault code was cleared and we could now recalibrate the MAF (something they say has to be done after replacing or baking the DPF system) the scan tool failed to recalibrate the MAF said it was out of range and trigged a MAF fault code pulled the MAF and it was dirty cleaned it with special MAF cleaner put it back in
9 Tried again to recalibrate the MAF this time it completed but the soot level went from 11% to 250% durning the recalibration process only took about 9 mins
10. Was told to check the EGR valve cause soot shouldn't build that quick checked EGR values came back saying EGR was stuck open so we pulled EGR and it was stuck in had to cut it apart to get it out replaced the EGR valve and pulled dozer again the dozer itself was clogged again but not much
11. Hook truck back up checked soot level still at 250% did a forced regen temps got to 800 (cab was not blocked in) Soot only dropped to 230s after 2 regens scan tool says the dozer fuel rate is 8 psi durning regen

So very sorry for my long post but I had to give step by step in hopes of triggering a light bulb in someone's head I'm hopeful someone has had similar problems and can help me out I'm lost I think the truck hasn't had successful regens in a whole and the soot has backed up and built up but I'm not sure, When the truck runs it runs good, not coolant loss at all, only think I'm positive of at this point is its haunted Lol any help or ideas would be great thanks in advance
Why won't the temps get up to 1000 like it should?
Why did the soot level jump so high in only 10 mins?
What am I missing? (Other than sleep )
Click to expand...

Did you ever pull the screen to see if it was clogged?

AlleeTaborn · Jul 12, 2019

Guest said: ↑

Did you ever pull the screen to see if it was clogged?
Click to expand...

I meant to say SCR lol thos androids

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