Regen with CTS
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Senior User
Joined: Feb 2012
Posts: 463
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From: San Marcos, TX
Regen with CTS
Lately the soot level is not getting below 1.6 or so before the regen cycle stops. So in just a few miles it's back up to start a new regen. Would a manual regen do a better job to get it lower or am I just wasting fuel?
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
I have initiated a manual regen a few times when it doesn't seem to thoroughly do the job on its own due to my driving habits. I have never seen manual regen take it below 1.0 and it usually ends up in the 1.10 range. It definitely seems to help if you are experiencing frequent/incomplete regens.
Fleet Mechanic
Joined: Jun 2009
Posts: 1,346
Likes: 4
From: Connecticut
Mine stops at around 1.4 alot of the time.I can get it to manually regen to around .9 or so.But I honestly dont know if it goes any longer between regens because it seems to very quickly go from .9 to 1.4.... So ive stopped manually bringing it below 1.4 because I personally feel im just wasting fuel.
Thread Starter
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Senior User
Joined: Feb 2012
Posts: 463
Likes: 1
From: San Marcos, TX
I have initiated a manual regen a few times when it doesn't seem to thoroughly do the job on its own due to my driving habits. I have never seen manual regen take it below 1.0 and it usually ends up in the 1.10 range. It definitely seems to help if you are experiencing frequent/incomplete regens.
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
Honestly, manual regen is a PITA. The engine turns 2,000 rpm, the fan clutch fully engages and it sounds like a Harrier jet is trying to takeoff in your driveway! It takes forever for the exhaust temp to come up high enough to start burning the soot and as mentioned by rtazz17, the soot level jumps back up so quick that it does seem like a waste of time. Basically, if you haven't gotten the "Drive to clean filter" message because of multiple incomplete cycles, it really isn't necessary. I have found the best fix for a long run of short drive cycles/high soot concentration is some good hard towing of the fifth wheel. The DPF always behaves better for a while after it gets a good workout with the big trailer!
Fleet Mechanic
Joined: Jun 2009
Posts: 1,346
Likes: 4
From: Connecticut
Honestly, manual regen is a PITA. The engine turns 2,000 rpm, the fan clutch fully engages and it sounds like a Harrier jet is trying to takeoff in your driveway! It takes forever for the exhaust temp to come up high enough to start burning the soot and as mentioned by rtazz17, the soot level jumps back up so quick that it does seem like a waste of time. Basically, if you haven't gotten the "Drive to clean filter" message because of multiple incomplete cycles, it really isn't necessary. I have found the best fix for a long run of short drive cycles/high soot concentration is some good hard towing of the fifth wheel. The DPF always behaves better for a while after it gets a good workout with the big trailer!
Thread Starter
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Senior User
Joined: Feb 2012
Posts: 463
Likes: 1
From: San Marcos, TX
Honestly, manual regen is a PITA. The engine turns 2,000 rpm, the fan clutch fully engages and it sounds like a Harrier jet is trying to takeoff in your driveway! It takes forever for the exhaust temp to come up high enough to start burning the soot and as mentioned by rtazz17, the soot level jumps back up so quick that it does seem like a waste of time. Basically, if you haven't gotten the "Drive to clean filter" message because of multiple incomplete cycles, it really isn't necessary. I have found the best fix for a long run of short drive cycles/high soot concentration is some good hard towing of the fifth wheel. The DPF always behaves better for a while after it gets a good workout with the big trailer!
I might try a manual regen after driving when the exhaust temps are normal and the soot level is near max. That should minimize the regen start time. I guessed that doing a regen from a cold start would not be the best choice.
I assume by your screen name that you are the proud owner of a JD 720. What engine? As a teen I learned to start a JD A and B "all fuel" (for those who don't know, they had 2 fuel tanks, gasoline and kerosene.) You would open the cylinder pet ***** to reduce compression, turn the flywheel to start it on gas and you could then switch the fuel line over to run on kerosene. We usually just let them run on gasoline because kerosene had become more expensive. I loved the exhaust smell of the "Popin Johnnys". It had a sweet smell, kind of like a top fuel dragster burning nitro-methane. Good days and fond memories.
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Lead Driver
Joined: Jan 2010
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Likes: 84
They key is to run the Edge manual regen after you've already been in regen for a few minutes where EGT4 temps are high when you pull into your driveway.
You can answer those eight screens fairly quickly. Ear protection is suggested!
I've run this process fully once during the above conditions and took it down to 1.0 and it stopped.
EGT4 was still 1100° so I flipped on the high idle thinking that would improve it but that causes it to increase the soot GPL again so that didn't help.
That was the second time, the first time I stopped it a few minutes later because (1) it was loud and (2) I was really only playing with the new Edge update at that time.
I was thinking it may have been an option to command while driving which would be perfect.
I'm with the others, it seems to be a waste unless the truck is reporting the drive to clean, which I've never seen anyways.
But since I chickened out the first time I of course had to make sure I allowed it to complete the second time.
You can answer those eight screens fairly quickly. Ear protection is suggested!
I've run this process fully once during the above conditions and took it down to 1.0 and it stopped.
EGT4 was still 1100° so I flipped on the high idle thinking that would improve it but that causes it to increase the soot GPL again so that didn't help.
That was the second time, the first time I stopped it a few minutes later because (1) it was loud and (2) I was really only playing with the new Edge update at that time.
I was thinking it may have been an option to command while driving which would be perfect.
I'm with the others, it seems to be a waste unless the truck is reporting the drive to clean, which I've never seen anyways.
But since I chickened out the first time I of course had to make sure I allowed it to complete the second time.
Thread Starter
|
Senior User
Joined: Feb 2012
Posts: 463
Likes: 1
From: San Marcos, TX
They key is to run the Edge manual regen after you've already been in regen for a few minutes where EGT4 temps are high when you pull into your driveway.
You can answer those eight screens fairly quickly. Ear protection is suggested!
I've run this process fully once during the above conditions and took it down to 1.0 and it stopped.
EGT4 was still 1100° so I flipped on the high idle thinking that would improve it but that causes it to increase the soot GPL again so that didn't help.
That was the second time, the first time I stopped it a few minutes later because (1) it was loud and (2) I was really only playing with the new Edge update at that time.
I was thinking it may have been an option to command while driving which would be perfect.
I'm with the others, it seems to be a waste unless the truck is reporting the drive to clean, which I've never seen anyways.
But since I chickened out the first time I of course had to make sure I allowed it to complete the second time.
You can answer those eight screens fairly quickly. Ear protection is suggested!
I've run this process fully once during the above conditions and took it down to 1.0 and it stopped.
EGT4 was still 1100° so I flipped on the high idle thinking that would improve it but that causes it to increase the soot GPL again so that didn't help.
That was the second time, the first time I stopped it a few minutes later because (1) it was loud and (2) I was really only playing with the new Edge update at that time.
I was thinking it may have been an option to command while driving which would be perfect.
I'm with the others, it seems to be a waste unless the truck is reporting the drive to clean, which I've never seen anyways.
But since I chickened out the first time I of course had to make sure I allowed it to complete the second time.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
Since you have noticeable differences in the AR process and you know your truck, it's certainly worth the shot.
Nothing wrong with a bit of troubleshooting and it'll cost you less in fuel than you would spend buying a sub or something.
Put it in an open area, open the hood and give it a shot. Try to avoid that orange glow part, HA!
The point I was attempting to make and one you'll find out soon enough is this just isn't needed often and to let the truck do it's thing.
Nothing wrong with a bit of troubleshooting and it'll cost you less in fuel than you would spend buying a sub or something.
Put it in an open area, open the hood and give it a shot. Try to avoid that orange glow part, HA!
The point I was attempting to make and one you'll find out soon enough is this just isn't needed often and to let the truck do it's thing.
Fleet Mechanic
Joined: Jun 2009
Posts: 1,346
Likes: 4
From: Connecticut
Since you have noticeable differences in the AR process and you know your truck, it's certainly worth the shot.
Nothing wrong with a bit of troubleshooting and it'll cost you less in fuel than you would spend buying a sub or something.
Put it in an open area, open the hood and give it a shot. Try to avoid that orange glow part, HA!
The point I was attempting to make and one you'll find out soon enough is this just isn't needed often and to let the truck do it's thing.
Nothing wrong with a bit of troubleshooting and it'll cost you less in fuel than you would spend buying a sub or something.
Put it in an open area, open the hood and give it a shot. Try to avoid that orange glow part, HA!
The point I was attempting to make and one you'll find out soon enough is this just isn't needed often and to let the truck do it's thing.
Thread Starter
|
Senior User
Joined: Feb 2012
Posts: 463
Likes: 1
From: San Marcos, TX
Good results
I've been doing a lot of short town trips lately and it was starting a regen nearly every day. So, this morning it starts on the way to work. I popped the hood and started the process. It ran at 2k rpm for about 5 minutes and then slowed to idle. I checked the CTS and it was still showing 1.96 on the soot level, but I did notice that EGT 4 was still around 1200. So I let it idle for a while and the soot level continued down until it stopped at 0.36. I've never seen it below 1.15. 
Senior User
Joined: Jul 2012
Posts: 233
Likes: 0
I've been doing a lot of short town trips lately and it was starting a regen nearly every day. So, this morning it starts on the way to work. I popped the hood and started the process. It ran at 2k rpm for about 5 minutes and then slowed to idle. I checked the CTS and it was still showing 1.96 on the soot level, but I did notice that EGT 4 was still around 1200. So I let it idle for a while and the soot level continued down until it stopped at 0.36. I've never seen it below 1.15.
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
I assume by your screen name that you are the proud owner of a JD 720. What engine? As a teen I learned to start a JD A and B "all fuel" (for those who don't know, they had 2 fuel tanks, gasoline and kerosene.) You would open the cylinder pet ***** to reduce compression, turn the flywheel to start it on gas and you could then switch the fuel line over to run on kerosene. We usually just let them run on gasoline because kerosene had become more expensive. I loved the exhaust smell of the "Popin Johnnys". It had a sweet smell, kind of like a top fuel dragster burning nitro-methane. Good days and fond memories.
This can definitely be a contributing factor to frequent regen. As you get later in the oil life cycle and you have been seeing frequent regens, the oil starts to get diluted with fuel and vaporizes into the CCV system much easier which in turn causes more soot in the DPF. Another item to check is the exhaust backpressure tube near the turbo. When mine came loose, the regens became more frequent. I believe a leak in the EBP tube causes more EGR usage which contributes to the soot.