WVB
Well-Known Member
- First Name
- Wes
- Joined
- Apr 12, 2020
- Threads
- 2
- Messages
- 46
- Reaction score
- 34
- Location
- Arvada, CO
- Vehicle(s)
- 2020 Willys Unlimited 3.0L Diesel HellaYella
Not gonna work on a compression ignition engine.
Sponsored
Interesting considering I drove a pentastar JLUR for 10,000 miles and never logged greater than a 0.1mpg gain with ESS. Engineering something for a purpose does not preclude it from increasing wear and introducing reliability problems...see EGR and DPF for a couple prime examples. An electric fan does not maintain the flow of coolant, which is precisely why the manual also has a list of idle-time recommendations before shutdown...at the price of fuel wash down? Who knows, but the engineers seem comfortable with the trade off. Maybe ESS has temperature cutoffs to avoid turbo cooling issues, but I’ll take my approach. Soot production at idle in a modern diesel at operating temperature is of little significance unless you spend foolish amounts of time in stop and go traffic...in which case maybe a diesel wrangler wasn’t the right choice. Regardless, this is the brilliant thing about choice...you leave your ESS on and I disable mine because we have different driving conditions and assessments of risk. We can touch base in 10-20 years and see whose crystal ball worked better.ESS is proven to save fuel to the tune of at least 1 MPG on the Pentastar in the real world. How much does it save on the EcoDiesel? Probably more since higher-MPG vehicles are more sensitive to change and idling. So, ESS is not a joke.
Engine longevity? They engineered the starter motor, flywheel, etc. to handle start/stop events long term. Cooling? The cooling fan is electric. It can still run with the engine shut down. Off-road? The manual specifically states to push the button and turn it off when rock crawling.
The potential downsides to disabling ESS are worse....idling causes fuel wash-down on modern diesels which dilutes your crank case with diesel fuel which in turn increases cylinder and valvetrain wear. Idling also increases DPF sooting and increases the number of regen cycles.
If you want your engine to last longer AND save you money, leave the ESS alone. I was bummed to discover the Ram application doesn't have ESS.
I was thinking the same this morning. I had a 20 minute trip mostly highway and my coolant and oil temp reading was 210/224 when I was about to take an exit and anticipated a traffic stop. I disabled ESS and stopped at the traffic light for 1.5 minutes. Once the light turned green, I had to stop again crossing the overhead bridge. I enabled ESS back on and ESS did kick in at 220 plus oil temps. So I guess ESS requires a higher threshold for it to be not active.Interesting considering I drove a pentastar JLUR for 10,000 miles and never logged greater than a 0.1mpg gain with ESS. Engineering something for a purpose does not preclude it from increasing wear and introducing reliability problems...see EGR and DPF for a couple prime examples. An electric fan does not maintain the flow of coolant, which is precisely why the manual also has a list of idle-time recommendations before shutdown...at the price of fuel wash down? Who knows, but the engineers seem comfortable with the trade off. Maybe ESS has temperature cutoffs to avoid turbo cooling issues, but I’ll take my approach. Soot production at idle in a modern diesel at operating temperature is of little significance unless you spend foolish amounts of time in stop and go traffic...in which case maybe a diesel wrangler wasn’t the right choice. Regardless, this is the brilliant thing about choice...you leave your ESS on and I disable mine because we have different driving conditions and assessments of risk. We can touch base in 10-20 years and see whose crystal ball worked better.
We need to stop the fuel wash-down story. It's the second time I have seen it stated in the last 24 hours on this forum and to member that do not know any better it would be concerning, rightfully so.. It is not a concern in the 3.0 EcoDiesel and most new diesels in general . It has been proven not to be a problem by the EPA.ESS is proven to save fuel to the tune of at least 1 MPG on the Pentastar in the real world. How much does it save on the EcoDiesel? Probably more since higher-MPG vehicles are more sensitive to change and idling. So, ESS is not a joke.
Engine longevity? They engineered the starter motor, flywheel, etc. to handle start/stop events long term. Cooling? The cooling fan is electric. It can still run with the engine shut down. Off-road? The manual specifically states to push the button and turn it off when rock crawling.
The potential downsides to disabling ESS are worse....idling causes fuel wash-down on modern diesels which dilutes your crank case with diesel fuel which in turn increases cylinder and valvetrain wear. Idling also increases DPF sooting and increases the number of regen cycles.
If you want your engine to last longer AND save you money, leave the ESS alone. I was bummed to discover the Ram application doesn't have ESS.
Yep, that's what I thought.Having driven diesel trucks for years and being able to monitor EGTs I would say that after a 1 1/2 mile cool down you’re probably fine to shut it down when you hit your driveway. It usually takes about 3-4 minutes of idling to cool down to safe temps to avoid coking of the oil in the turbo.
At least two I can think of is the DPF and the turbo.Seems we need better diagnostic monitors than provided so we can effectively monitor certain operating conditions. Better to know than guess.
I have thought that as well. So I have a Scangauge 2 ordered. It lists 11 gauges not on the offroad page, like EGT, Regen active,distance since last regen, soot mass load.Seems we need better diagnostic monitors than provided so we can effectively monitor certain operating conditions. Better to know than guess.