Thank you for this!! I'm a Shop Foreman at a Dept. of Transportation shop and this video has really helped me understand how to diagnose these systems better. We don't get any kind of training for shit like this so it's much appreciated my good man!!
Hey buddy, great job explaining the Cummings emissions system. You have just addressed my current problem. I have a 2014 ISX15. I am currently having an issue with the 7th injector possible overdosing. I have a Doc and Dpf temp that has read 3200 degrees and would cause the truck to signal a shut engine down. I managed to clear the code and regenerated in a controlled environment so that I could monitor the Temps and also heat gun the exhaust system when this occurred again. When it happened again, the light proceeded to activate, and the Doc showed 3200 deg, then the DPF followed suit. I checked with a temp gun while this was going on, but the temp gun showed 1032 degrees at its highest. The SCR stayed at around mid 800 inlet and high 700 at the outlet. Can the DOC handle this much temp, or could that be a fault/default reading once the Temps reach its max threshold? Should I replace the DOC if it has reached a higher than normal temp as well as the DPF filter? When I had the Dpf off to get clean, it failed. They cleaned, and it passed, but when they tried the pin test, it only went half way threw. Your thoughts?
The only way to know for sure is take it apart and see if the DPF element is melted. 3200 is high but the temp you recorded with the gun isn’t so I really can’t know for sure if it caused other issues without knowing which temp is accurate. Again, removing and inspecting would be my first step.
Born and raised in trucking, now 39 years behind the wheel, I have diesel in my blood and my favorite cologne is Diesel Chanel #2. Quite honestly I can't wait until we quit using diesel fuel for our trucks and instead use Hydrogen which obviously still requires SCR treatment but it seems to me that we'd have cleaner engines internally without all that carbon buildup, and because Hydrogen is not petroleum oil, the engines wouldn't produce soot and fine particles and would not require after-treatment filtration, only SCR catalyst for NOX. My latest spotter truck does it's parked regen 2-3 times a night however I've noticed it's not using the DEF fluid, the gauge has not moved all week.Sounds like another expensive repair is about to ensue. Of all the after-treatment systems currently in use, I like the one Mack Trucks uses the most.
@@CrazyxxxUkraine Very true, there is also a dosing valve test you can do if you have the right software. Most people probably don’t and your method is good. There is a strainer/filter for the DEF that should be checked if supply to the doser is blocked.
Appreciate the video, I'm looking for any information on Detroit DOC face plate cleaning, with 1 box removed. We have had success with reaching into the down pipe and lightly brushing the plate face then shop vacuuming to get the soot out. I understand the 5-6 hour DOC regen, just looking for anything different? Thanks
When the DOC face gets plugged up and you don’t want to completely remove the assembly then what you described is pretty much the way to do it. I’ve seen people try to flush them out with hoses but I don’t recommend that.
Awesome video, thank you for it. You mentioned some modern engines don't come with an EGR because their SCR is so good. Can you mention which engines are those (of the regularly used in OTR)?
I have been on a cruise and am at the Rome airport now. When I get back to Arizona I will look at the magazine I read and let you know which ones are doing that.
Hey Charley! Got an ISX 15 2015 that keeps sticking in warm-up mode, that’s where the six injectors are spraying extra fuel and no. 7 is NOT dosing. Long story short…..Spent$$$$$$$$, been everywhere! Likes to do it most when fuel mileage is bordering on fantastic like an empty flatbed deadhead. Ever seen this before? Apparently nobody else has! Thanks!
the Dosing issue could be that injector has carbon build up issues. you might have a bad water temp sensor, there are so many potential reasons it is really hard to nail down without hooking up to a computer and monitoring some values.
@@charleysgarage Water temp sensor makes sense. However, it has been hooked up countless times in the last 18 months or so to no avail$$$$$$. If you have minute google “No Codes! No Lights!” at Rawze and check my post. This tells the whole story! Update since that post: Some days it will do warm-up mode a couple times like a 50 mile deadhead in the morning then another deadhead at the end of the day. Other times loaded with short deadheads it’ll go more than a week. Thanks again!
The L2 isn’t hard if you know electrical and can follow a schematic. You will get a book that is a composite vehicle and it will ask questions about it. Take your time and remember not every answer is in the schematic. Some of them are in the verbiage that describes components and functions. You’ll do great.
I have never worked full time in an auto dealership but I think the extra aftertreatment on a diesel, plus extra costs of diesel components to begin with that it would be much more expensive to maintain and probably contributes to more downtime than automotive emissions controls.
Diesel exhaust contains 3 to 17% oxygen, it is not inert like gasoline engines. We need much larger percentage of exhaust gas to reduce combustion temperature.
Sorry for the initial short reply, I had to do some research into what you said, think I will make a video on that topic now that I am more familiar with it, pretty interesting topic.
Did anyone other then me here him say you have you have the exhaust cleaned after so money cycle. So where will that soot go?? Back in the atmosphere. This hole system is just a money grab. It cost to have the system clean the system is unreliable, expensive to repair burns more fuel brings down fuel mileage. Its sad. We have the tech to really solve the problem, but they will not give it to us they cannot make any money off of it. This system is not efficient. Good job explaining why it doesn't work well at all.
I want people to understand that we exchange soot for higher CO2 emissions. Are decreasing soot levels worth higher fuel usage and CO2 emissions? We are increasing our ammonia/fixed nitrogen content (lots of governments want to reduce the nitrogen fertilizer) of exhaust in exchange for lower NOX. My opinion is urea injection/ammonia is a net benifit. I don't feel the same way about the DPF with increased CO2 in exchange for decreased soot. There are no perfect solutions, only tradeoffs.
You are right on all of that. It’s sort of like a pick your poison. Like I have said in other comments though, my goal is to help people understand how these systems work because regardless of our feeling about them techs have to maintain them. I’m not a big fan, a lot due to the things you mentioned but I know how to fix them and get paid for it.
Higher CO2 = Slightly worse for the Earth (specifically, the Ozone) Higher NOx and/or soot = up to 50x more deadly to humans The lower the NOx/soot the better, it causes lung cancer for people of all ages. Extremely dangerous and it also causes smog and acid rain. You may argue that we shouldn't be wasting diesel as it means more oil needs to be burnt in plants, which is correct! But, if that oil is being burnt 120mi from a city center, that's fine (in oil refineries). If that diesel is being burnt in a city with hundreds of thousands of people and coming out through an exhaust with very little aftertreatment; you/me/the people will inhale that sooty/NOx filled air into our lungs. Killing us in the short term. Lower CO2 will help the planet in the *long term.* Lower NOx and soot levels will help us in the *short (perhaps, even the long too) term.*
@@charleysgarage if you're being genuine, thanks. I took my time writing the comment. I just speak from my experience and I will not always be 100% right in what I'm saying as I am not a qualified in emission control but I have owned lots of petrol and diesel cars including hybrids and even an electric. I understand how the systems work. Although none of my BMW's ever suffered from DPF/DEF/EGR/SCR/OXI CAT issues, (they make extremely reliable diesel engines. *Again, from experience and from what others have told me.) I have dealt with cars with failed dpfs and have tried my best to understand the complex design of the systems.
That is a great topic for a video and 1 that I will make as soon as I am done with the massive rewire project on the Mustang. Thanks for the suggestion!
So tell me why an EGR diesel truck engine lasts 300k miles and an EGR deleted truck engine lasts over 1 million(same 6.7 engine)? Introducing exhaust back into the motor is NOT a better design. Screw the EPA and Tree Huggers!
EGR puts nasty carbon rich (soot) back in the intake for the sake of reducing NOx emissions. That soot coats intake manifolds, fouls up valves, effects engine cylinders, contaminates oil etc… that being said you should get more than 300K.
@@randellgribben9772 Sure, send them my way, I can donate them to a school. In the meantime go to an EPA website to complain, not a place that teaches people to maintain equipment. there is a word for people like you, it is troll, see if you can get Dr, Suess to explain that for you.
This is horrible. This makes owning a truck expensive , and makes them very unreliable. And if you count the manufacturing of all these components and DEF fluid and extra diesel burnt and the shipping of these products all over the country. You're creating more problems than you are doing any good. horrable
Why are you acting like I invented the stuff. I am just explaining how they work. If you want to complain about their existence go to the EPA website. Not saying I disagree with you, just not on topic with the video. Unfortunately these systems aren’t going anywhere and technicians need to understand them, like them or not.
@@victorbernier4765 you do know that Biodiesel is usually a max percentage of 20% bio and 80% diesel right? Natural gas, propane and other alternative fuels would be much better options for those concerned about emissions.
I'm sorry , I'm a mechanic of 40 yrs . I mean a real one . Egr and most other available treatments work when new ,then they kill engine. hydrogen 10% mix cleans bur n and engine
“Real” mechanics don’t need to run around on social media proclaiming their realness Plus your ramble makes no sense and has nothing to do with this video other than display an ignorance of the topic.
@@victorbernier4765 again I will say it with smaller words. She is right, it does cause damage. I didn’t invent the dang thing I just explained how it works. If people would actually stick to the topic we wouldn’t have issues. I didn’t title this video “EGR is the best thing ever created by man” and again., it DOES NOT matter if we like it or not (I don’t) as a technician you need to understand and be able to maintain it.
Its really sad to see so many idiots coming onto a man's channel who is spreading knowledge that is very much needed in order to be good and make money fixing and repairing these systems. The low IQ splurge your dealing with isnt fair. Obviously no one wants them on their truck, but they are here to stay and if you dont understand them your ganna get left behind. This is the first video of yours I have seen and you kept me interested the whole time, explained the systems in great detail, and gave me some knowledge I appreciate. Its too bad there arent more guys like you in the industry willing to share their knowledge like this. The only way to make good money is to sit back and listen to the guys that have conquered these systems and take that knowledge and run with it. I appreciate it highly. Hope to see more of your videos.
@@V8rngrboy50 thanks for the kind words. More videos definitely coming. Hopefully some more hydraulic and Diesel engine content. Anyone who puts their stuff out in the public domain is gonna run into keyboard warriors who want everyone to be as miserable as they are. I usually just delete the wort of them but some just help to prove a point.
![5-GAS EXHAUST EMISSION ANALYSIS [SIMPLE]](http://i.ytimg.com/vi/ah1SkGGQxvc/mqdefault.jpg)
I've watched quite a few videos like this but yours has explained it extremely well and easy to understand. Great video!
Thanks!
@@charleysgarageooo9ooo😮😅
Thank you for this!! I'm a Shop Foreman at a Dept. of Transportation shop and this video has really helped me understand how to diagnose these systems better. We don't get any kind of training for shit like this so it's much appreciated my good man!!
Any other training video topics you want just ask!
Awesome video, super helpful as an apprentice heavy duty truck mechanic.
@@Ess-mt9jt thanks. Let me know if there are other topics you want videos for.
I not too long switched over from auto mechanic to diesel mechanic thanks for the info made things a lot clearer 😊
I am glad I was able to help!
Very clear explanations, thank you it helped a lot!
Glad it helped!
Thx for the information interesting I have a 08 f450 6.4 diesel I'm having issues with the exhaust pipe leak and the floor mat is getting melted
Very good video and the sound is clear
GREAT explanation
Thanks!
Awesome job!
Thanks!
Thank a lot, simple yet detailed explanation
You are welcome
Thanks Charlie that was very informative
Your welcome! Thanks for watching
Very well done. Thanks for making this video.
You are very welcome. Thanks for watching it.
Hey buddy, great job explaining the Cummings emissions system. You have just addressed my current problem. I have a 2014 ISX15. I am currently having an issue with the 7th injector possible overdosing. I have a Doc and Dpf temp that has read 3200 degrees and would cause the truck to signal a shut engine down. I managed to clear the code and regenerated in a controlled environment so that I could monitor the Temps and also heat gun the exhaust system when this occurred again. When it happened again, the light proceeded to activate, and the Doc showed 3200 deg, then the DPF followed suit. I checked with a temp gun while this was going on, but the temp gun showed 1032 degrees at its highest. The SCR stayed at around mid 800 inlet and high 700 at the outlet. Can the DOC handle this much temp, or could that be a fault/default reading once the Temps reach its max threshold? Should I replace the DOC if it has reached a higher than normal temp as well as the DPF filter? When I had the Dpf off to get clean, it failed. They cleaned, and it passed, but when they tried the pin test, it only went half way threw. Your thoughts?
The only way to know for sure is take it apart and see if the DPF element is melted. 3200 is high but the temp you recorded with the gun isn’t so I really can’t know for sure if it caused other issues without knowing which temp is accurate. Again, removing and inspecting would be my first step.
Excellent explanation,thank you!
Glad it was helpful!
Born and raised in trucking, now 39 years behind the wheel, I have diesel in my blood and my favorite cologne is Diesel Chanel #2. Quite honestly I can't wait until we quit using diesel fuel for our trucks and instead use Hydrogen which obviously still requires SCR treatment but it seems to me that we'd have cleaner engines internally without all that carbon buildup, and because Hydrogen is not petroleum oil, the engines wouldn't produce soot and fine particles and would not require after-treatment filtration, only SCR catalyst for NOX. My latest spotter truck does it's parked regen 2-3 times a night however I've noticed it's not using the DEF fluid, the gauge has not moved all week.Sounds like another expensive repair is about to ensue. Of all the after-treatment systems currently in use, I like the one Mack Trucks uses the most.
You bring up some really good points. I like the hydrogen idea also but it appears that the industry is going electric instead.
Take the lines off the dozer see if there is def coming out of yes replace dozer if no then there may be a block in the line
@@CrazyxxxUkraine Very true, there is also a dosing valve test you can do if you have the right software. Most people probably don’t and your method is good. There is a strainer/filter for the DEF that should be checked if supply to the doser is blocked.
@@CrazyxxxUkraine This, the Def crystallizes and clogs the doser. Eventually it’s going to derate you if it hasn’t already.
Diesel is not going anywhere period
Appreciate the video, I'm looking for any information on Detroit DOC face plate cleaning, with 1 box removed. We have had success with reaching into the down pipe and lightly brushing the plate face then shop vacuuming to get the soot out. I understand the 5-6 hour DOC regen, just looking for anything different?
Thanks
When the DOC face gets plugged up and you don’t want to completely remove the assembly then what you described is pretty much the way to do it. I’ve seen people try to flush them out with hoses but I don’t recommend that.
Awesome video, thank you for it.
You mentioned some modern engines don't come with an EGR because their SCR is so good. Can you mention which engines are those (of the regularly used in OTR)?
I have been on a cruise and am at the Rome airport now. When I get back to Arizona I will look at the magazine I read and let you know which ones are doing that.
Great expanation. I learned a lot. Thanks.
Thank you for watching!
would be really cool if you could do a video running through each of the sensors and what they do and also common troubleshooting for each sensor.
That’s a good idea. Keep an eye out and I will try to make one I. The next couple of weeks.
@@charleysgarage thanks man!
Great video going to show this video to the new guys at work
Thanks. Glad you like it.
What did the guys at work think?
Hey Charley! Got an ISX 15 2015 that keeps sticking in warm-up mode, that’s where the six injectors are spraying extra fuel and no. 7 is NOT dosing. Long story short…..Spent$$$$$$$$, been everywhere! Likes to do it most when fuel mileage is bordering on fantastic like an empty flatbed deadhead. Ever seen this before? Apparently nobody else has! Thanks!
the Dosing issue could be that injector has carbon build up issues. you might have a bad water temp sensor, there are so many potential reasons it is really hard to nail down without hooking up to a computer and monitoring some values.
@@charleysgarage Water temp sensor makes sense. However, it has been hooked up countless times in the last 18 months or so to no avail$$$$$$. If you have minute google “No Codes! No Lights!” at Rawze and check my post. This tells the whole story! Update since that post: Some days it will do warm-up mode a couple times like a 50 mile deadhead in the morning then another deadhead at the end of the day. Other times loaded with short deadheads it’ll go more than a week. Thanks again!
@@onebadapple83 I will check that out.
Great video. Any pointers or videos for ase l2 would be great. Going this week, just trying to make sure I'm not missing anything.
The L2 isn’t hard if you know electrical and can follow a schematic. You will get a book that is a composite vehicle and it will ask questions about it. Take your time and remember not every answer is in the schematic. Some of them are in the verbiage that describes components and functions. You’ll do great.
@Charley’s Garage yea, I took it a few months ago. I missed it by 1 question.
@@shawnwilliams5616 there are many of us that didn’t pass that 1 on the first try. I did, but the steering and suspension one👎
Do a video on Electrical systems / CAN Bus
I can do that, look out for it in the next few weeks, probably January.
I wonder what the maintenance costs are compared to gas engine including down time
I have never worked full time in an auto dealership but I think the extra aftertreatment on a diesel, plus extra costs of diesel components to begin with that it would be much more expensive to maintain and probably contributes to more downtime than automotive emissions controls.
Amazing video brother
Thanks for the visit
For more info on emissions check out my book on Amazon! www.amazon.com/dp/B0CVSMDF1B
Diesel exhaust contains 3 to 17% oxygen, it is not inert like gasoline engines. We need much larger percentage of exhaust gas to reduce combustion temperature.
Thanks for that info. I was never sure of those specific numbers. I’ve also been told a peak of 25-20% of exhaust gas when EGR I valve is full open.
Do you have any videos on spark assisted dpf
No
Sorry for the initial short reply, I had to do some research into what you said, think I will make a video on that topic now that I am more familiar with it, pretty interesting topic.
Is the HPCR engine zero emissions
Not yet but getting very close.
This this a school or where are you guys located at? Nice engine stands and exhaust system so you can understand things
A school I used to work at, I work at a different school now. Arizona Automotive Institute.
great video
Thank you!
Delete, delete , delete , with that said, great explanation and thank you
You make more money repairing them then
deleting them and don’t risk fines or jail
Did anyone other then me here him say you have you have the exhaust cleaned after so money cycle. So where will that soot go?? Back in the atmosphere. This hole system is just a money grab. It cost to have the system clean the system is unreliable, expensive to repair burns more fuel brings down fuel mileage. Its sad.
We have the tech to really solve the problem, but they will not give it to us they cannot make any money off of it. This system is not efficient. Good job explaining why it doesn't work well at all.
😂
I want people to understand that we exchange soot for higher CO2 emissions. Are decreasing soot levels worth higher fuel usage and CO2 emissions?
We are increasing our ammonia/fixed nitrogen content (lots of governments want to reduce the nitrogen fertilizer) of exhaust in exchange for lower NOX. My opinion is urea injection/ammonia is a net benifit. I don't feel the same way about the DPF with increased CO2 in exchange for decreased soot. There are no perfect solutions, only tradeoffs.
You are right on all of that. It’s sort of like a pick your poison. Like I have said in other comments though, my goal is to help people understand how these systems work because regardless of our feeling about them techs have to maintain them. I’m not a big fan, a lot due to the things you mentioned but I know how to fix them and get paid for it.
Higher CO2 = Slightly worse for the Earth (specifically, the Ozone)
Higher NOx and/or soot = up to 50x more deadly to humans
The lower the NOx/soot the better, it causes lung cancer for people of all ages. Extremely dangerous and it also causes smog and acid rain. You may argue that we shouldn't be wasting diesel as it means more oil needs to be burnt in plants, which is correct! But, if that oil is being burnt 120mi from a city center, that's fine (in oil refineries). If that diesel is being burnt in a city with hundreds of thousands of people and coming out through an exhaust with very little aftertreatment; you/me/the people will inhale that sooty/NOx filled air into our lungs. Killing us in the short term. Lower CO2 will help the planet in the *long term.* Lower NOx and soot levels will help us in the *short (perhaps, even the long too) term.*
@@aidan1585 that’s an excellent breakdown of the situation.
@@charleysgarage if you're being genuine, thanks. I took my time writing the comment. I just speak from my experience and I will not always be 100% right in what I'm saying as I am not a qualified in emission control but I have owned lots of petrol and diesel cars including hybrids and even an electric. I understand how the systems work. Although none of my BMW's ever suffered from DPF/DEF/EGR/SCR/OXI CAT issues, (they make extremely reliable diesel engines. *Again, from experience and from what others have told me.) I have dealt with cars with failed dpfs and have tried my best to understand the complex design of the systems.
@@aidan1585 Always genuine in my replies. Especially well thought out ones like yours.
How to get best fuel economy from your cummins engine
That is a great topic for a video and 1 that I will make as soon as I am done with the massive rewire project on the Mustang. Thanks for the suggestion!
Remove the egr
So tell me why an EGR diesel truck engine lasts 300k miles and an EGR deleted truck engine lasts over 1 million(same 6.7 engine)?
Introducing exhaust back into the motor is NOT a better design. Screw the EPA and Tree Huggers!
EGR puts nasty carbon rich (soot) back in the intake for the sake of reducing NOx emissions. That soot coats intake manifolds, fouls up valves, effects engine cylinders, contaminates oil etc… that being said you should get more than 300K.
do you have childern.. do you care about the world you are giving them? or do you not care?
@@randellgribben9772 thank you for the entertaining gibberish.
@@charleysgarage perhaps if you could not understand.,.i can send you some Dr. Seuss books... more your level of reading
@@randellgribben9772 Sure, send them my way, I can donate them to a school. In the meantime go to an EPA website to complain, not a place that teaches people to maintain equipment. there is a word for people like you, it is troll, see if you can get Dr, Suess to explain that for you.
This is horrible.
This makes owning a truck expensive , and makes them very unreliable.
And if you count the manufacturing of all these components and DEF fluid and extra diesel burnt and the shipping of these products all over the country.
You're creating more problems than you are doing any good.
horrable
Why are you acting like I invented the stuff. I am just explaining how they work. If you want to complain about their existence go to the EPA website. Not saying I disagree with you, just not on topic with the video. Unfortunately these systems aren’t going anywhere and technicians need to understand them, like them or not.
So true biodiesel is the best fuel source cleaner and no emissions. Proven time and time again.
@@charleysgarage oh they are going very soon and the Diesel will be more better than before.
@@victorbernier4765 pray tell, when and where are they going?
@@victorbernier4765 you do know that Biodiesel is usually a max percentage of 20% bio and 80% diesel right? Natural gas, propane and other alternative fuels would be much better options for those concerned about emissions.
your just going to walk around a garage full of mammoth engines and not show the rest??!?!?!?!?!!
Sorry, guess i am just used to them. Lol
I'm sorry , I'm a mechanic of 40 yrs . I mean a real one . Egr and most other available treatments work when new ,then they kill engine. hydrogen 10% mix cleans bur n and engine
“Real” mechanics don’t need to run around on social media proclaiming their realness Plus your ramble makes no sense and has nothing to do with this video other than display an ignorance of the topic.
@@charleysgarage actually he has a point egr destroys the engine life and durability. It’s been proven to many times.
@@victorbernier4765 again I will say it with smaller words. She is right, it does cause damage. I didn’t invent the dang thing I just explained how it works. If people would actually stick to the topic we wouldn’t have issues. I didn’t title this video “EGR is the best thing ever created by man” and again., it DOES NOT matter if we like it or not (I don’t) as a technician you need to understand and be able to maintain it.
Its really sad to see so many idiots coming onto a man's channel who is spreading knowledge that is very much needed in order to be good and make money fixing and repairing these systems. The low IQ splurge your dealing with isnt fair. Obviously no one wants them on their truck, but they are here to stay and if you dont understand them your ganna get left behind. This is the first video of yours I have seen and you kept me interested the whole time, explained the systems in great detail, and gave me some knowledge I appreciate. Its too bad there arent more guys like you in the industry willing to share their knowledge like this. The only way to make good money is to sit back and listen to the guys that have conquered these systems and take that knowledge and run with it. I appreciate it highly. Hope to see more of your videos.
@@V8rngrboy50 thanks for the kind words. More videos definitely coming. Hopefully some more hydraulic and Diesel engine content. Anyone who puts their stuff out in the public domain is gonna run into keyboard warriors who want everyone to be as miserable as they are. I usually just delete the wort of them but some just help to prove a point.