So disappointed in this Diesel platform; wish there was a return policy.

[CrazyCooter]

Went and pulled some data logs while towing this AM. These numbers will SHOCK any diesel owner... I totally understand what is happening now, and why we are all seeing different oil / coolant numbers when derates happening.

Here was the test.

1. Load up my camper and truck and take it to a scale to get an accurate measurement of weights. With the weight distribution hitch, myself, empty bed, basic tools, full tanks of DEF / Fuel.

1. Jeep Weight : 6240 LB (close to max payload, with 1 person, and no camping gear in bed!)
2. Trailer Weight: 3140 LB (about 50% of what it should be able to safely move)
3. Trailer Frontal Area: 48ft apx...

(I have the PDF for the weights from a CAT scale if anybody is interested)
**** (This has a weight distribution hitch involved some some of the trailer weight will be transfered to the truck. Likely 450lbs with the way I have things setup)

2. Drive around town, then up i70 (7% grade starting at 5300ish ft up to evergreen 7700ft apx), capture a ton of details via OBD.

Important details.

1. Air Temp 72
2. 5th Gear holding 2100(ish) rpm
3. 55mph
4. 40-70% engine torque demand was held (not pedal position, but demanded engine torque metric (from OBD))
5. Throttle pedal was about 20-40% position.
6. DPF Soot Load was about 45% (fine)
7. DPF regen status was 0, meaning not in a regen state.

Findings.

Near meltdown EGT's sustained... During the incline min EGT was 1090, max was 1590!!!!

The big hill climb started at about 8:43, with another smaller hill that was close to the 8:26 mark.

These high EGT's melt piston's, valves, etc. These high temps are UNACCEPTABLE, any diesel builder will tell you, this is an Engine Killer situation. Hope these Italians used titanium for valves and pistons....

I was in the slow lane, AC OFF. I was driving VERY easy, there was plenty of room left I could have pushed a lot harder.

I also tracked Oil / Coolant temps, but again these are not my main concern anymore.... frankly they are high, but I am not concerned with either of these.

High of 255 oil, and 242 Coolant. Seems hot but these are fine.....

Possible solutions.

1. Rework Intake / Exhaust (maybe a larger DPF?, DPF back exhaust / intake?)
2. Install a more efficient bigger turbo with less resistance.
3. Water/Meth Injection

I think Water/Meth Injection is the answer here while towing....

If anybody knows a respected Diesel mechanic (Denver Area), that can work out a BOLT ON, (meaning no permanent holes in my intake system) in case I need warranty work... and install a AEM Water/Meth Injection Kit on my truck I would be willing to pay a fair amount, and will test it again.. I can't find a bolt on kit for this engine anywhere....

I am not worried about the power side of the Meth injection at all, but the water element is really needed here to cool EGT's.....

Nice test with data! Did you experient a de-rate?

Egts aren't far off from what I saw in my 2006 Ram 3500 running a stock tune, so I wasn't alarmed to see 1500+.

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[CreepyJeepy]

Nice test with data! Did you experient a de-rate?

Egts aren't far off from what I saw in my 2006 Ram 3500 running a stock tune, so I wasn't alarmed to see 1500+.

I didn’t derate on that trip. I bet if I do the same thing later this week when it’s high 90’s I will.

 

[foo.c]

It'd be interesting to see boost vs EGT. I assume it was full boost over the period of increase.

 

[foo.c]

Also keep in mind if the EGT is 1500F (measured at the turbo inlet I assume), the combustion temp in the cylinder could be 2000F,2500F. Who knows ... lots of heat though.

 

[CreepyJeepy]

Also keep in mind if the EGT is 1500F (measured at the turbo inlet I assume), the combustion temp in the cylinder could be 2000F,2500F. Who knows ... lots of heat though.

FYI was not full boost over that period. But there was definitely boost.

Remember 7% grade, 7 miles

here is with applied torque / speed. This shows I was nowhere near full throttle.


this shows from on-ramp to exit.

 

[foo.c]

Yeah, seems as expected.

 

[bl1ndman]

Here is a video where an eco diesel Wrangle and Gladiator cut power at the same time. Not one have been regeared and the other has not

 

[maligator]

Random question, is there a mode where the truck derates and actually notifies you somehow, or was there just a specific scenario where it was happening when no warnings were given. I know this is a problem in some of the new half tons and most at least give like a non-specific confusing derate message lol.

 

[Rat2Desert]

No message, no warning, oil and water temps normal, at least for me. Mostly unexpected . . . though I was aware of the potential I thought I had allowed enough cool down time to avoid the heat soak issue after stopping.

And no indication as to when the derate will stop, just magically goes fast again. 45 on a 75 limit freeway w/ lots of truck traffic is no fun.

Jeep needs to at least provide a warning and proper messaging . . . "idle for 10 more minutes before driving over 45", etc.

 

[lrtexasman]

Just sucks. Hope they can this addressed

 

[CreepyJeepy]

Yeah I agree some software updates are absolutely needed.

today was hot and the Jeep heat soaked, and was unable to go over 45mph on the on-ramp, no load behind the Jeep, line of cars behind me. About the time I was merging on the highway full power came back…..

I did snag a tazer mini, the fan feature might help out, time will tell.

 

[MOPAR Boy]

Yeah I agree some software updates are absolutely needed.

today was hot and the Jeep heat soaked, and was unable to go over 45mph on the on-ramp, no load behind the Jeep, line of cars behind me. About the time I was merging on the highway full power came back…..

I did snag a tazer mini, the fan feature might help out, time will tell.

I totally agree the software should be updated to let the driver know to pull over for an adequate cool down period. But, better yet, maybe the underlying problem can be solved. I don’t really see a way this can realistically happen though on existing inventory. Maybe 2023 model?

I could definately be wrong, but I seem to remember about 18 months before the eco became available, an FCA bigwig said in an interview that eco may only be available for about 3 years, or so. Not sure why such a short timeframe, but maybe by then FCA planned for electric to come on so robustly that low end torque needs will be solved via electric power?

 

[WXman]

Remember when engineers said they would not offer the 2.0T engine because they couldn't keep it cool in the tight JT engine bay while towing? What makes you guys think a 3.0TD would be any different? Of course this thing is going to run hot if you're towing in the mountains. Personally I am just THRILLED that Jeep gave us the diesel option at all! I love it.

I also think it's great that they've programmed it to protect itself so that unassuming owners can't kill the engine.

I probably tow bigger and heavier than anybody in this forum, granted not in the Rocky Mountains. I don't have any issue with my truck at all. It runs as cool as a cucumber even on the 100°F heat index kind of days. I still say it's not fair to pass judgement on the JTD for getting hot in the Rocky Mountains as we have seen ALL other brands of trucks do the same.

 

[CreepyJeepy]

FYI many of us derate without towing.

No load, not driving like ass… nothing out of a normal.

glad it was just me in the car…. I got lucky there wasn’t an 18 wheeler hauling ass right towards me.

jeep needs to patch this thing and notify the driver when it’s in a derate state.

Once a Few folks die from this, then we will start to see a recall / reprogramming. Till then, I bet we see nothing.

FYI what’s the joy in a Jeep if you are flat landing it all the time anyways, there is a big reason the Rockies are there biggest sales region.

 

[OrangeCJ]

Here is a video where an eco diesel Wrangle and Gladiator cut power at the same time. Not one have been regeared and the other has not

I lived this scenario almost play by play when we got into Idaho, my Dad in the Diesel JL pulling into the slow lane, and a few seconds later mine derated.... Coming back from Cali last week I did get new behaviour... Vehicle got up to 251F Oil temp on a hill climb and did not derate. NOT TOWING.

I have only towed once. My small M416 with camping gear, and that time I had no issues. Guess maybe I need to pull it everywhere LOL... will have to lay a coat of Sting-Gray down on it first

Seems there are too many factors to be able to predict it... I will say that under 5000 miles on the OD and it would always derate at 248F, and after 6000 miles on the OD it went up to 251F... but who knows, fuel quality, outside temp, regen status...

Since I have done the horn relocation, and the hood vents from SB, and saw no results, I am now looking at modifying my Smittybuilt Bumper, and trying to take the solenoid off my winch to get everything out from in front of the grill. Was also looking into the possibility of using some Kevlar tubing to direct airflow from the front or the fender over the oil cooler... Engineering by a guy who is not a engineer I guess.

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