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  #85  
Old 08-14-2014, 05:55 PM
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Re: exhaust system regeneration process

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Originally Posted by mtnmerlin View Post
What is the procedure to do a manual, stationary regen?

I would like to go camp in some remote location and explore the roads over several days. That will be many hours of driving without highway speeds. I am concerned that I will get into a regen problem.
You must have a WiTech terminal (dealer only) to force a regen. The unofficial method is to watch the EGT with an ODB2 reader and, when you see it start a regen, keep RPMs steady at 1800 to 2000 until the EGT drops from 1200°F to below 800°F. That signals a regen completion. Its hard to do because the turbo wants to speed the motor up. It takes a steady foot for 8 to 10 minutes.

His do I know this? I got a bad tankful of dirty diesel and my GC attempted to regen every 40 miles or so. I decided at that rate the DPF could plug if it didn't complete as often as possible. I learned to nurse it through a regen even in city traffic and idling.

I don't recommend the technique but in a pinch its nice to know how to let it regen in otherwise unfavorable conditions.

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  #86  
Old 08-14-2014, 10:49 PM
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Re: exhaust system regeneration process

Quote:
Originally Posted by mtnmerlin View Post
...

I would like to go camp in some remote location and explore the roads over several days. That will be many hours of driving without highway speeds. I am concerned that I will get into a regen problem.
I have been taking my Jeep camping multiple times. I also drive a number of miles of trails and dirt roads while camping and I have not had any issues with my DPF filling up. But I do pull a trailer on the way to camping and my cat temp usually goes up while pulling uphill so my DPF my be clean when I get there.
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  #87  
Old 08-16-2014, 10:45 PM
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Re: exhaust system regeneration process

I have just had this happen twice in 2 days, updated software etc, 400ks later back in limp mode, redone and waiting to see how long it goes this time ( all highway driving as well)
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  #88  
Old 08-17-2014, 08:25 AM
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Re: exhaust system regeneration process

I have 7200 miles on my Summit and never saw this message until two weeks ago after I put fuel in from a station that I normally don't use. Now I've seen it twice. The first time I had to stop before the message cleared (was heading into work). A few hours later when I started the vehicle the message had cleared. The following week I received the message again and immediately took the vehicle on a short highway run at 70mph . After about 10-15mins received a message that Regen process was completed. I've never seen the message that others have reported saying "Drive at Highway Speeds etc..."

Is it possible it could be from a 'questionable' tank of fuel? I normally drive 140 mile (RT) every weekend at ~70-75mph so I would think it should have plenty of time to regen on its own.
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  #89  
Old 08-17-2014, 06:28 PM
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Re: exhaust system regeneration process

I had done 22,000km mostly all highway and towing my van and the light came on for the first time and said 80percent full and was regenerating or similar and after about 20kms and went off and said it was cleaned. Next time I drove it after about 10kms it came on again but this time said 100 percent full and went into limp mode. Sent to dealer on tilt tray (130KM) they upgraded software and done manual clean and all ok. Went less than 400km light came on again and again went on tilt truck to a different dealer as we were heading north with caravan. They have done the same procedure but cant guarantee all is well. My concern is when we head off on our next trip through central Aus is that if it happens we are 1000km from a dealer. I would like to know how to do this manual regen with the computer.
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  #90  
Old 08-18-2014, 03:23 AM
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Quote:
Originally Posted by growler View Post
I had done 22,000km mostly all highway and towing my van and the light came on for the first time and said 80percent full and was regenerating or similar and after about 20kms and went off and said it was cleaned. Next time I drove it after about 10kms it came on again but this time said 100 percent full and went into limp mode. Sent to dealer on tilt tray (130KM) they upgraded software and done manual clean and all ok. Went less than 400km light came on again and again went on tilt truck to a different dealer as we were heading north with caravan. They have done the same procedure but cant guarantee all is well. My concern is when we head off on our next trip through central Aus is that if it happens we are 1000km from a dealer. I would like to know how to do this manual regen with the computer.
I suggest you have the DPF replaced. If its not responding to the forced Regeneration then there must be something wrong with it. That said, it could also be that the ECU for whatever reason isn't going into regeneration mode properly.
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  #91  
Old 08-19-2014, 06:16 AM
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Re: exhaust system regeneration process

Quote:
Originally Posted by Grady2014 View Post
I have 7200 miles on my Summit and never saw this message until two weeks ago after I put fuel in from a station that I normally don't use. Now I've seen it twice. The first time I had to stop before the message cleared (was heading into work). A few hours later when I started the vehicle the message had cleared. The following week I received the message again and immediately took the vehicle on a short highway run at 70mph . After about 10-15mins received a message that Regen process was completed. I've never seen the message that others have reported saying "Drive at Highway Speeds etc..."

Is it possible it could be from a 'questionable' tank of fuel? I normally drive 140 mile (RT) every weekend at ~70-75mph so I would think it should have plenty of time to regen on its own.
This is exactly the message I get, not the "Drive at Highway Speeds.." that others get. It seems like I have to do a regen every 3000 miles or so.
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  #92  
Old 08-19-2014, 07:01 PM
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Is there a way to tell when the vehicle is doing a regen
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  #93  
Old 08-19-2014, 07:55 PM
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Re: exhaust system regeneration process

Quote:
Originally Posted by Grady2014 View Post
I have 7200 miles on my Summit and never saw this message until two weeks ago after I put fuel in from a station that I normally don't use. Now I've seen it twice. The first time I had to stop before the message cleared (was heading into work). A few hours later when I started the vehicle the message had cleared. The following week I received the message again and immediately took the vehicle on a short highway run at 70mph . After about 10-15mins received a message that Regen process was completed. I've never seen the message that others have reported saying "Drive at Highway Speeds etc..."

Is it possible it could be from a 'questionable' tank of fuel? I normally drive 140 mile (RT) every weekend at ~70-75mph so I would think it should have plenty of time to regen on its own.
That looks like the system is working properly, the filter is filling up and the system is performing an active regen. While the message looks a bit different to others, this may just be due to software changes (I wonder if the latest update removes the reference to highway speeds?).

But I don't think this is a problem, or that different diesel has caused anything wrong to happen.

The active regen won't happen everytime you drive, it will trigger when the sensor detects the filter is starting to clog (it uses air pressure sensors).

Lots of highway driving will result in passive regeneration (which is good), but that is different to this process where exhaust gas is increased to actively burn off particulate and clear the filter.
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  #94  
Old 08-19-2014, 08:03 PM
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Re: exhaust system regeneration process

Quote:
Originally Posted by growler View Post
I had done 22,000km mostly all highway and towing my van and the light came on for the first time and said 80percent full and was regenerating or similar and after about 20kms and went off and said it was cleaned. Next time I drove it after about 10kms it came on again but this time said 100 percent full and went into limp mode. Sent to dealer on tilt tray (130KM) they upgraded software and done manual clean and all ok. Went less than 400km light came on again and again went on tilt truck to a different dealer as we were heading north with caravan. They have done the same procedure but cant guarantee all is well. My concern is when we head off on our next trip through central Aus is that if it happens we are 1000km from a dealer. I would like to know how to do this manual regen with the computer.
Some other aussie owners have had these symptoms, and after the 2nd burn failed to clear, Jeep replaced the dpf.

Only a Jeep service center can trigger a manual burn, I'd try to put some kms on it before a big trip to give some confidence, otherwise ask the service center if they will replace it.
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  #95  
Old 08-19-2014, 08:06 PM
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Re: exhaust system regeneration process

Quote:
Originally Posted by ExcursionDiesel View Post
You must have a WiTech terminal (dealer only) to force a regen. The unofficial method is to watch the EGT with an ODB2 reader and, when you see it start a regen, keep RPMs steady at 1800 to 2000 until the EGT drops from 1200°F to below 800°F. That signals a regen completion. Its hard to do because the turbo wants to speed the motor up. It takes a steady foot for 8 to 10 minutes.

His do I know this? I got a bad tankful of dirty diesel and my GC attempted to regen every 40 miles or so. I decided at that rate the DPF could plug if it didn't complete as often as possible. I learned to nurse it through a regen even in city traffic and idling.

I don't recommend the technique but in a pinch its nice to know how to let it regen in otherwise unfavorable conditions.
Hi Excursion, do you notice the oil temp meter in evic increasing when the system is regenerating?
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  #96  
Old 08-19-2014, 09:31 PM
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Oil temp should not change appreciably. The heat is mostly generated by burning fuel inside the DPF rather than in the engine. You'll find that EGT is actually several hundred degrees less than DPF temp during a regen.
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