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  #73  
Old 08-05-2014, 08:57 PM
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Re: exhaust system regeneration process

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I would not buy a diesel Jeep unless you can drive it regularly at highway speeds and in my case I would not buy a diesel Jeep period. I intend to sell it and buy something more reliable.
Its not a Jeep thing, or a VM Motori thing, it is a DPF thing. Purchasing any diesel vehicle with a DPF is not a good idea if all it gets is short run/low stress use. In Aus and Europe there are ton of smaller passenger cars that have constant issues because the driving style is not suitable for DPFs. It is an education thing, and a big part of that is dealer education and clarifying with the consumer the conditions the car will be driven in.

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  #74  
Old 08-05-2014, 10:05 PM
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Re: exhaust system regeneration process

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Originally Posted by SNUKE View Post
Its not a Jeep thing, or a VM Motori thing, it is a DPF thing. Purchasing any diesel vehicle with a DPF is not a good idea if all it gets is short run/low stress use. In Aus and Europe there are ton of smaller passenger cars that have constant issues because the driving style is not suitable for DPFs. It is an education thing, and a big part of that is dealer education and clarifying with the consumer the conditions the car will be driven in.
I agree that Jeep should try to educate the buying public if the vehicle must only be used in a specific way but I disagree that it is not a Jeep thing. It is a Chrysler thing, a Jeep thing, a Fiat thing, a VM Motori thing and a Bosch thing. Plenty of modern diesel vehicles with a DPF seem to have it figured out.
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  #75  
Old 08-05-2014, 10:25 PM
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Re: exhaust system regeneration process

Okay sure, it is a Jeep thing, I missed a word, it should have been “not JUST a Jeep thing”. Speak to the thousands and thousands of Mazda, Subaru, Opel (GM), VW, Mitsubishi and more owners that have had their DPF bring them to a stop. It is a DPF thing, they are horrid for short distance driving. Selective Catalytic Reduction apparently is a far better system in this regard. You guys in Nth Merica have a weird situation of getting a DPF with part of a SCR system.

Subaru put this on their website

“So again it is clear that a diesel engine vehicle requires a driving style and method of use that is only suitable for longer distances and higher loads! If this is your particular method of use and you travel high kilometres then a diesel engine vehicle is particularly suitable due to the fuel efficiency and environmental performance. But if you normally travel short distances then a petrol engine is a better choice.”
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  #76  
Old 08-10-2014, 11:52 PM
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Re: exhaust system regeneration process

Definately agree that this is not just a Jeep issue, but a DPF issue. I did get the DPF almost full message for the first time after about 7500 miles on the car. I was surprised because my wife had just returned from an all highway 400 mile trip three days prior to getting the message. I took it on the highway and it immediately went through the regen process - I monitored it on my OBDII scanner. The message dissappeared as soon as the regen was completed and everything was fine. I was just curious why we would get that message after driving on the highway just a few days before. We have been doing mostly driving around town and have never had that message before.

By the way I love the diesel and have not had a single issue since we have owned the car.
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  #77  
Old 08-11-2014, 12:25 AM
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Re: exhaust system regeneration process

Did the OBDII scanner show anything?
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  #78  
Old 08-11-2014, 07:33 AM
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Re: exhaust system regeneration process

"Did the OBDII scanner show anything?"

Yes, as soon as I got on the highway the exhaust temperature started to rapidly rise. It went to about 1220 F for about 10 minutes and then fell rapidly back off to about 600 F. As soon as the temperature dropped back down the message on the EVIC went away. It actually started trying to regen before I got to the highway at lower speeds but it would not get above about 900 F in stop and go traffic. This is the same pattern I have ssen a couple of times before on the OBDII scanner (but those times I just happened to catch it with no EVIC message).
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Old 08-11-2014, 11:24 AM
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Re: exhaust system regeneration process

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Originally Posted by bustergc View Post
Definately agree that this is not just a Jeep issue, but a DPF issue. I did get the DPF almost full message for the first time after about 7500 miles on the car. I was surprised because my wife had just returned from an all highway 400 mile trip three days prior to getting the message. I took it on the highway and it immediately went through the regen process - I monitored it on my OBDII scanner. The message dissappeared as soon as the regen was completed and everything was fine. I was just curious why we would get that message after driving on the highway just a few days before. We have been doing mostly driving around town and have never had that message before.

By the way I love the diesel and have not had a single issue since we have owned the car.
It is good to hear that some JGC diesels are regenerating as designed. Mine is not and from what I can tell by looking at a variety of forums, nether are quite a few others.
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  #80  
Old 08-11-2014, 11:42 AM
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Re: exhaust system regeneration process

Mine has regened properly for 18k miles. I never got an EVIC message but ODB2 monitoring revealed that it regened every 130 to 180 miles depending on driving conditions. Something recently failed in the DEF (SCR) system and off to the shop it went. Tje EVIC basically said "bad DEF, 200 miles until engine won't start" I should be getting it back this week.

I did have a bad tank of "dirty" fuel once and it regened more often until I refueled. I had to make sure I didn't idle or stop and go much during that time.
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Old 08-11-2014, 12:24 PM
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They'll go into regeneration at less than highway speeds only if there aren't long stops. My commute to the bus terminal is about six miles of 30-40mph continuous roads with only three lights. It will complete a regen if I drive around for a couple more miles after getting home. I drive until CAT1 gets below 1,000 degrees as viewed on Torque.
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  #82  
Old 08-11-2014, 01:14 PM
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Re: exhaust system regeneration process

Believe it or not, you can keep it in regen at any speed including dead still if you can hold RPMs around 1500-1800. That's easier said than done as the turbo makes the motor try to run away. It takes extreme concentration and driving technique using the paddle shifters and going to neutral while braking to a stop light.

"Don't try this at home"...lol.
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  #83  
Old 08-14-2014, 11:17 AM
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Re: exhaust system regeneration process

So I heard from the case worker about the issue. She said there is no known flash to correct the problem and that Jeep was going to block sales of diesel Jeeps to rural areas of Alaska. For the record she doesn't seem to have a clue but I have a vehicle that hasn't regenerated since I received it back from the dealer and driving it is like waiting for the other shoe to drop. My Jeep has been out of service at the dealership 10 days total in 4,294 miles or one hour for every 18 miles driven. I cancelled an order of a new Dodge 1500 diesel and I will be selling my JGC.
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  #84  
Old 08-14-2014, 11:59 AM
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Re: exhaust system regeneration process

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Originally Posted by ExcursionDiesel View Post
Believe it or not, you can keep it in regen at any speed including dead still if you can hold RPMs around 1500-1800. That's easier said than done as the turbo makes the motor try to run away. It takes extreme concentration and driving technique using the paddle shifters and going to neutral while braking to a stop light.

"Don't try this at home"...lol.
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.
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