389 Hood
Well-Known Member
This entire world economy is depending on China these days. I think cutting the apron strings is long overdue.
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This entire world economy is depending on China these days. I think cutting the apron strings is long overdue.
Wondered how long it would take for this to come up here in a trucking forum, LOL. Started to post about it several weeks ago, decided to see who would bring it up.
China, and I believe Russia (other countries as well possibly) have stopped exporting it.
Australia is in panic mode right now, with only about 4 weeks or so of supply left and no clear answers as to where to get it from.
Not sure where the United States stands on it right now, but don't be shocked to see codes being set due to poor quality if we begin to get desperate for supply.
China, and I believe Russia (other countries as well possibly) have stopped exporting it.
Australia is in panic mode right now, with only about 4 weeks or so of supply left and no clear answers as to where to get it from.
Not sure where the United States stands on it right now, but don't be shocked to see codes being set due to poor quality if we begin to get desperate for supply.
389 Hood
Well-Known Member
I'm still, 4 months later waiting for a DEF quality sensor. I'm on the list with no end in site. They are now allotting dealer shops only 5 per week.
The only reason I'm working is due to a code writing genius who wrote a delete for the ISX-15. Everything pertaining to the DEF system is turned off. The truck operates no different than it did using the DEF. The exhaust tips are still clean and the exhaust still stinks like it did with the DEF activated. The biggest drawback is the 1-2 mpg drop in fuel economy which I've been insisting would return with the removal of the DPF and blocking of the EGR. I'm told not to touch it until I experience a loss in power. Otherwise, in 2 hours the entire system could be corrected.
It's been turned off for about 25,000 miles which surely is enough to plug up the DPF. I can't get into the dash settings to see how full it is, because that setting has been removed. There has to be some excessive back pressure because even empty I'm running 20psi of boost, whereas before I would sit at about 10psi on flat land with the cruise on.
The only reason I'm working is due to a code writing genius who wrote a delete for the ISX-15. Everything pertaining to the DEF system is turned off. The truck operates no different than it did using the DEF. The exhaust tips are still clean and the exhaust still stinks like it did with the DEF activated. The biggest drawback is the 1-2 mpg drop in fuel economy which I've been insisting would return with the removal of the DPF and blocking of the EGR. I'm told not to touch it until I experience a loss in power. Otherwise, in 2 hours the entire system could be corrected.
It's been turned off for about 25,000 miles which surely is enough to plug up the DPF. I can't get into the dash settings to see how full it is, because that setting has been removed. There has to be some excessive back pressure because even empty I'm running 20psi of boost, whereas before I would sit at about 10psi on flat land with the cruise on.
Electric Chicken
Well-Known Member
DPF cleaning interval on my Mack is 400k, and I just had it done a few months ago.
Electric Chicken
Well-Known Member
Yes but it cooks it, it doesn't actually eliminate it. I don't know if it turns it into ash or what but it eventually fills the filter.
yep. as long as that is working, it will do what the DEF helps with, but will just happen alot more often, which is likely what is resulting in the increased fuel consumption.
Electric Chicken
Well-Known Member
DEF doesn't do anything to the actual particles. It's meant to neutralize the toxicity of the diesel exhaust fumes.
Yep, it's two separate processes. DEF is injected to work with the SCR to reduce NOx. The particulates are handled by the DPF.
Electric Chicken
Well-Known Member
Hence the better the fuel management, the cleaner burning the engine, the longer intervals/fewer emissions issues.
I think this is also where automatics can be better than manuals. The best ones are almost always in the best gear for fuel management, reducing losses and emissions associated with poor gear selection. They also don't waste fuel with over-revs for downshifting or missed shifts. The computer times the blip and engagement.
389 Hood
Well-Known Member
The entire system is deleted from my engine. It doesn't consume a drop of DEF and it never regens. When it did, you could hear the difference, the oil temp would rise 5 degrees and it wasn't as responsive in the throttle. Plus it made a different noise and occasionally, I would see yellowish smoke come out as I was driving.
Electric Chicken
Well-Known Member
I wonder what would happen, if anything, if you removed the dpf filter and hollowed it all out. Then it would never clog.
BlackBart
Well-Known Member
In his case that might work, but normally there’s sensors on either side of that measure inflow and out flow rates. If theyre the same it’ll kick a fault code
Electric Chicken
Well-Known Member
Yeah I wouldn't suggest it on an undeleted truck. That would be ludicrous.
BlackBart
Well-Known Member
That would depend on what exactly his tune covered. Hopefully it got them sensors too...
Rigjockey
In Gord we trust!
I hope there will be a shortage of DEF because.. Anarchy.
Also I hope they will legislate a temporary order to make it legal to do a delete.
Then everyone will see how fucking useless and expensive all of this emissions crap on diesel engines really is!
Plus we actually depend on China for this Bullpiss?
That right there is reason enough to scrap the DEF system altogether and find another way to build a better diesel engine!
Also I hope they will legislate a temporary order to make it legal to do a delete.
Then everyone will see how fucking useless and expensive all of this emissions crap on diesel engines really is!
Plus we actually depend on China for this Bullpiss?
That right there is reason enough to scrap the DEF system altogether and find another way to build a better diesel engine!
389 Hood
Well-Known Member
Yes, every emissions sensor has been eliminated. I know in time, the DPF will have to be pulled, then the catalyst will have to have holes punched in it. So far, we have 8 trucks running this tune and no issues from any of them even with emissions sniffers. The DPF's are being left in to keep the trucks quiet. As soon as they are pulled that giant can becomes a hollowed out muffler and one hit of the jakes coming in a scale will alert the staffers.
Maybe pull them to clean them, then reinstall to see how much further they will go? Only time is going to tell with this. But the newest thing at the repair shops is a sign that states any vehicle found with emissions modifications will be put back together at the customers expense and removed from the property at the customers expense. So if you are towed in, you may be being towed out. That's a hefty cost right there.
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