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  #25  
Old 04-01-2014, 06:32 PM
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Re: exhaust system regeneration process

Its ok to interrupt an active regen that does not show an EVIC message. If you don't have an ODBII device to monitor exhaust temperature, you won't know you are interrupting anything. It happens all the time on all our GC diesels.

The problem arises when people don't operate at highway speeds for 20 minutes and the DPF fills beyond the normal levels....then you get the EVIC message. At that point DRIVE. Get it cleared out and all us well. If you ignore it and go on with your low speed driving, it will clog!

I have 12k miles on mine and have never seen an DPF warning. I suspect it takes a several days and a few hundred miles of low speed operation to fill the DPF enough to get the message.

Soon, someone will discover a method to trick the back pressure sensors and gut or remove the DPF....
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  #26  
Old 04-01-2014, 06:54 PM
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Re: exhaust system regeneration process

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Originally Posted by TypeRod View Post
Hi all, I'm considering getting a 2014 GC Ecodiesel, and I googled dpf regeneration and it brought me to this thread. So I registered and here I am! lol! I have a 2013 Passat TDI, regeneration interruptions are a concern as well. In the Passat we dont have any message displaying like you all do in your GC's, but I use a scangauge and monitor diff. EGT's to inform me of a re-gen in progress.

But my question to you folks that say, its ok if you interrupt a re-gen in the GC's, and it will start again once you start driving the vehicle again. Don't you all have a concern of extremely high turbo temps during re-gens and possibly oil coking in the turbo? I'm new to diesels and especially to Jeeps, but maybe there is a new process or procedure this Ecodiesel engine has that my TDI doesn't.

I'll be trolling this forum for sometime until I can make myself pull the trigger and buy an Ecodiesel! lol!
Yes, if you interrupt a regen it will (should) start again when your exhaust temps are up and you are doing highway speeds (I'm not sure the minimum speed required).

But if the alert came up saying the filter is 80% full, I'd keep driving and let it regen down a bit, rather than risk it going into limp mode.

The dpf temp needs to be about 550-600c to regen, turbos should be able to take that temp and higher for short periods without problem. A regen normally takes 15-20mins.
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  #27  
Old 04-01-2014, 06:56 PM
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Re: exhaust system regeneration process

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Originally Posted by ExcursionDiesel View Post
Its ok to interrupt an active regen that does not show an EVIC message....
Oh yeah, sorry, in Oz we get the message during regens, in the US you don't unless it is getting close to full.
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Old 04-01-2014, 08:23 PM
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Re: exhaust system regeneration process

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Originally Posted by Benn0 View Post
Yes, if you interrupt a regen it will (should) start again when your exhaust temps are up and you are doing highway speeds (I'm not sure the minimum speed required).

But if the alert came up saying the filter is 80% full, I'd keep driving and let it regen down a bit, rather than risk it going into limp mode.

The dpf temp needs to be about 550-600c to regen, turbos should be able to take that temp and higher for short periods without problem. A regen normally takes 15-20mins.
I'm not sure if this is what my '14 North American version does. I parked it during regen today (temps over 1,100F) and when I hit the highway again later that day it did not get above about 700F even though oil temp was up in the 205F range for awhile.

Being a North American build, mine doesn't give regen status, I can just watch the temps on my phone from the WIFI OBDII I plugged into it.
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  #29  
Old 04-01-2014, 09:04 PM
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Re: exhaust system regeneration process

If interrupted, I don't think regen starts again unless the DPF is filled above a certain threshold and speed requirements are met. If it burns down below that threshold, it waits until it goes above again. The threshold is probably well below the warning level. I wish there was a known OBDII parameter to see the back pressure sensors.
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  #30  
Old 04-02-2014, 06:03 AM
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Re: exhaust system regeneration process

Quote:
Originally Posted by ExcursionDiesel View Post
Its ok to interrupt an active regen that does not show an EVIC message. If you don't have an ODBII device to monitor exhaust temperature, you won't know you are interrupting anything. It happens all the time on all our GC diesels.

The problem arises when people don't operate at highway speeds for 20 minutes and the DPF fills beyond the normal levels....then you get the EVIC message. At that point DRIVE. Get it cleared out and all us well. If you ignore it and go on with your low speed driving, it will clog!

I have 12k miles on mine and have never seen an DPF warning. I suspect it takes a several days and a few hundred miles of low speed operation to fill the DPF enough to get the message.

Soon, someone will discover a method to trick the back pressure sensors and gut or remove the DPF....
Quote:
Originally Posted by Benn0 View Post
Yes, if you interrupt a regen it will (should) start again when your exhaust temps are up and you are doing highway speeds (I'm not sure the minimum speed required).

But if the alert came up saying the filter is 80% full, I'd keep driving and let it regen down a bit, rather than risk it going into limp mode.

The dpf temp needs to be about 550-600c to regen, turbos should be able to take that temp and higher for short periods without problem. A regen normally takes 15-20mins.
Thanks for the replies! I believe its pretty much the same for my TDI as well. If you interrupt it a certain amount of times in a row, a CEL will light up (I think...) and the stealership will have to force a re-gen thru s/w.

I totally understand that the turbo can take those temps, but its oil coking within the turbo during those extreme temps that should be concerning. Then for example you don't know a re-gen is happening, then you just arrive at your destination during a re-gen, then park the vehicle and shut it off. Having those super high temps in the turbo then shutting the engine off is the concern for me. IMHO, I would have to say if at all possibly NEVER turn off the engine during a re-gen, and that its not ok to do so. But thats just me, I'm a car enthusiast and I like to take care of my vehicles. Thats just my 2 shillings. lol
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  #31  
Old 04-02-2014, 09:09 AM
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Re: exhaust system regeneration process

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Originally Posted by TypeRod View Post
Thanks for the replies! I believe its pretty much the same for my TDI as well. If you interrupt it a certain amount of times in a row, a CEL will light up (I think...) and the stealership will have to force a re-gen thru s/w.

I totally understand that the turbo can take those temps, but its oil coking within the turbo during those extreme temps that should be concerning. Then for example you don't know a re-gen is happening, then you just arrive at your destination during a re-gen, then park the vehicle and shut it off. Having those super high temps in the turbo then shutting the engine off is the concern for me. IMHO, I would have to say if at all possibly NEVER turn off the engine during a re-gen, and that its not ok to do so. But thats just me, I'm a car enthusiast and I like to take care of my vehicles. Thats just my 2 shillings. lol
The problem with this is that you would have to ALWAYS be watching your EGT with a scan tool, since there is no other easy indication that the truck is doing a re-gen.

I know that to watch my EGT I have to have my iphone connect manually to my wifi OBDII unit...then open the app and be looking at it. It also makes my cell phone act a little wonky since it's connected to a wifi that doesn't also provide internet data. Kind of a pain to have to do this every time.

I guess you could install a gauge somewhere...but I'll be a follower instead of a leader on that project.
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  #32  
Old 04-02-2014, 03:25 PM
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Re: exhaust system regeneration process

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Originally Posted by amr40509 View Post
The problem with this is that you would have to ALWAYS be watching your EGT with a scan tool, since there is no other easy indication that the truck is doing a re-gen.

I know that to watch my EGT I have to have my iphone connect manually to my wifi OBDII unit...then open the app and be looking at it. It also makes my cell phone act a little wonky since it's connected to a wifi that doesn't also provide internet data. Kind of a pain to have to do this every time.

I guess you could install a gauge somewhere...but I'll be a follower instead of a leader on that project.
Yes my friend, I totally agree with you. These type of vehicles IMHO, require a level of attention that a normal non-car enthusiast is not willing to give. I'm a total car nut, so I'm willing to go the extra mile to monitor EGT's and such to ensure my vehicle stays healthy. Most people just want to start their car and go, once they get to their destination, just shut it off and leave their vehicle. If they are that type, then this car is not for them. lol.
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  #33  
Old 04-02-2014, 04:00 PM
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Quote:
Originally Posted by TypeRod View Post
I totally understand that the turbo can take those temps, but its oil coking within the turbo during those extreme temps that should be concerning. Then for example you don't know a re-gen is happening, then you just arrive at your destination during a re-gen, then park the vehicle and shut it off. Having those super high temps in the turbo then shutting the engine off is the concern for me. IMHO, I would have to say if at all possibly NEVER turn off the engine during a re-gen, and that its not ok to do so.
Doesn't the car abort a regen in progress if you drop below the speed threshold for more than a given amount of time? If so I don't see your scenario being a problem, unless you live directly off a street with 50+ mph speed limit. I used to live 1/4 mile from the freeway offramp, it still took me at least 4 minutes to get home after exiting the freeway, with traffic lights and such.
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Old 04-02-2014, 04:16 PM
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Re: exhaust system regeneration process

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Originally Posted by amr40509 View Post
I guess you could install a gauge somewhere...but I'll be a follower instead of a leader on that project.
I use a ScanGuage II.
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  #35  
Old 04-03-2014, 07:48 AM
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Re: exhaust system regeneration process

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Originally Posted by Rumline View Post
Doesn't the car abort a regen in progress if you drop below the speed threshold for more than a given amount of time? If so I don't see your scenario being a problem, unless you live directly off a street with 50+ mph speed limit. I used to live 1/4 mile from the freeway offramp, it still took me at least 4 minutes to get home after exiting the freeway, with traffic lights and such.
I don't know about the ecodiesel GC's and their process/protocol of re-gen cancelling, as I don't own one. I'm on this forum just doing research since I am interested in one. I have a 2013 Passat TDI,. In my Passat TDI, I don't think speed is a criteria for a re-gen to happen/continue, just from this youtube vid of someone in a Passat TDI sitting in his/her driveway while a re-gen is going on, which you can see has named in their scangauge2 as "CAT".



My main point is if you're not monitoring the proper EGT (as in my Passat there are diff. ones) or any EGT, and your turbo is flaming hot and you don't know it, and just shutdown the engine, your possibly grooming your turbo to be unhealthy.

EDIT: Rumline, check out this post by amr40509 in the "DEF Filter Warnings" on page 3, post #31. He shows his EGT (1178 deg. F) right before he got off a 60MPH road, then hit stop and go traffic for 5 mins and when arrived his/her destination his EGT was showing 1117 deg. F. And he/she says there was no message mentioning re-gen in the vehicle. That is a perfect example. The car never gave warning a re-gen was happening, but like you said, maybe there is a speed criteria, and it wasn't being met and the car cancelled the re-gen, but even after 5 mins of stop and go traffic, his EGT's were still super high. Good thing he/she monitors it, otherwise shutting the engine down at those EGT's is not good IMHO.
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Old 04-03-2014, 07:52 AM
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Re: exhaust system regeneration process

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Originally Posted by ExcursionDiesel View Post
I use a ScanGuage II.
I use a ScanGauge 2 as well in my Passat, those things are pretty cool!
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