Ecodiesel power derating as temps rise?

[ShadowsPapa]

We have active regen. Burns extra fuel to heat the dpf. I dont know if it's direct injection into the exhaust or just post combustion injection to send fuel down the exhaust to heat it. If your Intune with your truck you will notice when It happens. You will see a drop of a few mpg for 20 Min or so. One way to tell Is if you are coasting and watch the mpg meter you will notice that it will struggle to hit over 90 mpg while coasting. Keep an eye out and you will see it. And smell a different smell if you shut it off when it's doing its thing.
We also have passive regen while on the highway itll burn off if things get hot enough.

Thanks - I wondered. So they do have the active regen systems like other diesels, using fuel to heat things up, so to speak.

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[Glad_he_ate]

Yup burn more fuel to lesson ones carbon footprint...genius. my 2.8 dmax had an injector just before the dpf. I could see a 4 mpg loss for 30 min or so every tank to tank an a half of fuel used.. just dumping fuel into the exhaust and gaining zero work done. Every regen made me mad. When I tuned and deleted it it puffed a little bit of smoke when I started it. After that it ran clean no rolling coal or anything while going up a grade or towing my camper. All this stuff on small displacement diesel engines seems overkill especially when you look at fuel consumption just to burn soot off which still means it's going out the tailpipe eventually.
I have not looked Into how our system works some diesels just use the injection post combustion to push the heat up. Some like the d max inject raw fuel into the exhaust. Idk which one we have just that I know it does actively regen. And it's in the manual that should it do a full on active regen you will receive a message on the hud. I believe this only happens if the regen is not complete several times in a row. My zr2 would go into limp mode if that happened and then it was off to the dealer for a forced regen. Never happen to me but it's a common issue with the gm system. Sure would suck on the trail to get limp mode and limited power. ?

 

[steelponycowboy]

Why would the REGEN affect your MPG?

Because it failed to ReGen the 1st 8000 miles and got plugged up, something must still be plugging it up OR it is not automatically doing the REGEN so it might be the issue with poor MPG, overheating and other issues I have. Dealer says they haven't a clue (two dealers) and both said the eco diesel is a problem engine historically. Maybe it is, maybe it isn't but I know that mine is and my buddies is not. We both have about 20K miles on them now.

 

[Deleted member 22728]

Been awhile since my last post. Since then, I've geared to 4.56 and added the SB hood scoops. Intake air temps moderated significantly. As I had hoped/expected, the right scoop directs a steady stream of air over and across the EGR cooler. That area underhood would have peak temps approaching 200f, which is quite high given how the OE configured intake air to be drawn 75% from underneath the hood blanket. I trimmed the rear 2/3 of the air cleaner boot in order to drawn in some cool air from the left scoop, see above. Finally, appropriate gearing restored original shift points, including tip-out downshifting. Max oil temps observed post changes were 233f @ 90f ambient air, 65 mph climbing the Camp Verde grade. With one downshift to 7th, the rig ran comfortable on 8th gear otherwise. Overall fuel economy on the previous tank was 23.0, 60/40 suburban/highway.

I recently finished a short yet comprehensive training on the 3.0 from Stellantis. The engineer gave two specific bits of advice for the customer/operator: cruise control provides engine management the optimum opportunity for after treatment to cook effectively; and current ULS diesel has a shelf life of about 6 months.

 

[Courtsm3]

I noticed water wetter diesel being sold at my local parts store. Anyone tried that? Hyper lube also claims up to 20 celsius reduction. Curious, if I have issues I might give it a shot

 

[ZoneArc]

Snake Oil.

 

[CrazyCooter]

I wouldn't call it snake oil, but not sure it could help with this or not. Would Chrysler approve?

I do know Water Wetter fixed a marginal heat issue on my mother's car back in the 90s where every day on the way home with the ac on, it would nearly overheat. Added Water Wetter and she then could climb the hill with the ac on all summer. I've run it in all my off road motorcycles ever since.

 

[Deleted member 22728]

Ok, tomorrow I will be hitching-up to the 28' 2014 Airstream for a pull up the hill from Camp Verde. This trailer is usually dragged by the 15' EcoD Grand, but it's time to put feet-ta-fiya with this particular build. I'll post the readings.

 

[maligator]

I thought I would pop back into this thread to share a picture with y'all that may horrify you:

 

[mrmo]

I just ordered a Willys version w the diesel, after reading all of this im wondering if that was a big mistake, like others have said. My opinion is to downshift the trans to keep the egts lower, monitor the egts religiously, keeping it below 1100 F or so when pulling, and the restrictive exhaust dump can and related shit (egr) plus questionable regens are killing this engine.

 

[ZoneArc]

I just ordered a Willys version w the diesel, after reading all of this im wondering if that was a big mistake, like others have said. My opinion is to downshift the trans to keep the egts lower, monitor the egts religiously, keeping it below 1100 F or so when pulling, and the restrictive exhaust dump can and related shit (egr) plus questionable regens are killing this engine.

Do you plan to tow loads above 2500lbs up steep mountain grades like the Rockies/Sierras? If so, then you may have to climb them at 40mph. If not, then none of this will affect you.

 

[mrmo]

Do you plan to tow loads above 2500lbs up steep mountain grades like the Rockies/Sierras? If so, then you may have to climb them at 40mph. If not, then none of this will affect you.

Maybe, i get out there occasionally. Im telling you the choked off exhaust with extra fuel added to the cylinders for regen plus egr coolers in close prox is causing this. Engine compartment venting, get rid of the restrictive intake tubing, find a way to remove egr, watch egts and you shud pull mtns w no issue

 

[Deleted member 22728]

This pic was taken as I crested the climb north from Camp Verde, AZ, to the weight-station/rest area. The trailer being pulled is a 2014 28' Airstream International; the oil temp spiked to 240f when I had to increase speed to 70mph in order to overtake a slower RV. Once I resumed 62mph, oil temp returned to 235f, then back to 220f at the Sedona exit. Coolant held at 217f, and the venerable 8HP just barely fanned itself at 199f. With 4.56 gearing on 37 13.50's, it has little difficulty holding 7th on the grade while using cruise control. And finally, intake air temp dropped from the insane 199f pre-scoops to 88f, although ambient air was about 20f higher on the prior figure. I feel, that as far as my needs are concerned, this is a good balance.

Edit for pore grammer

 

[Gruffid]

since this engine is a fiat engine and is probably marketed to several overseas markets, I wonder if you were to take a gladiator to Mexico or South America if they would be able to retrofit the engine to local specs. Thus freeing up some of the restrictions and possibly helping the engine to run cooler.

 

[CrazyCooter]

This pic was taken as I crested the climb north from Camp Verde, AZ, to the weight-station/rest area. The trailer being pulled is a 2014 28' Airstream International; the oil temp spiked to 240f when I had to increase speed to 70mph in order to overtake a slower RV. Once I resumed 62mph, oil temp returned to 235f, then back to 220f at the Sedona exit. Coolant held at 217f, and the venerable 8HP just barely fanned itself at 199f. With 4.56 gearing on 37 13.50's, it has little difficulty holding 7th on the grade while using cruise control. And finally, intake air temp dropped from the insane 199f pre-scoops to 88f, although ambient air was about 20f higher on the prior figure. I feel, that as far as my needs are concerned, this is a good balance.

Edit for pore grammer

I expected you would be OK since ambient temps are so cool right now.

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