Just turned 2k miles.. 2 questions

[Jeepez]

I noticed my stop/start stopped working, no battery display, didn't think any thing of it other than happy I didn't have to deal with it. Got a leak in in my rear seal, took it to the dealer under warranty for the leak and mentioned my start/stop stopped working a few months ago. He checked the batteries, both were bad. No display no warnings. He said it was a common issue for that. They replaced both batteries, now I have to deal with the start/stop again until I get a Tazer.

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[ShadowsPapa]

I noticed my stop/start stopped working, no battery display, didn't think any thing of it other than happy I didn't have to deal with it. Got a leak in in my rear seal, took it to the dealer under warranty for the leak and mentioned my start/stop stopped working a few months ago. He checked the batteries, both were bad. No display no warnings. He said it was a common issue for that. They replaced both batteries, now I have to deal with the start/stop again until I get a Tazer.

Better that - meaning that the ESS wasn't working and it led them to finding battery issues - otherwise if you hadn't mentioned it, it would not have started at some point and required a jump.
Our dealer said they've had a lot of bad batteries come through. Both batteries in my wife's 2018 WK2 were replaced - the dealer said they tested bad (assuming won't hold charge/load test failure, they never give such details as I want)

In her case, no warning other than she got in to start it - nothing. Jump started it and it was fine for a couple of days, then didn't start again, again jump started it it was fine. Then the third time I put a battery charger on it for over 12 hours. Next day I turned off the charger and checked the voltage at the main battery - 11 volts. That was after a full charge with a known good charger. So the batteries never accepted a charge - definitely bad.

 

[Haley]

HVAC is set to MAX A/C (LO)

There you go.

If it's so unnecessary why is Jeep only one of many many using it? It's coming and its use growing.

It's not just about idling and fuel use (although that's part of it) it's about meeting upcoming changes in laws, etc. It's about EMISSIONS in a large way.
What you or others think is necessary or not is irrelevant. It exists, even in non-US vehicles. In fact, that's where it all started. Europe and Asia. Have you ever driven in Korean cities?

The technology is standard on all new Volvo vehicles, and every 2018 Ford and Lincoln vehicle that has stop/start technology, a total of 10 models - that from 2018.
Add Jaguar, Mercedes, Land Rover Range Rover, Several models of Chevy cars and trucks, Cadillac, Acura, Honda (reviews say Honda is among the worst behaved)

This is a source claiming even more results over-all - (initially it was figured at 3%+ fuel savings and 3%+ for emissions reduction)
For non-electric vehicles fuel economy gains from this technology are typically in the range of 3-10 percent, potentially as high as 12 percent. In the United States, idling wastes approximately 14.8 billion liters (3.9 billion U.S. gallons; 3.3 billion Imperial gallons) of gasoline per year.

For some cities, states and counties, it's EMISSIONS and there are anti-idling laws that are growing in scope and number.3% when combined with other actions is a huge deal in some cities. Big difference in breathing or not in some places.

Time for America to start seeing outside of their own garages. There's a world out there - and it doesn't revolve around us. Doesn't matter what you like - it's here to stay and growing in number.
People dislike what they don't understand. Even if it's for a greater good, it will be argued against because of personal dislikes and not with sound logic, but with dislike and hate.

For those open to learning - and engineering, here's something from one of the engineers involved when answering "but won't it wear out my starter" question -

"Automotive engineers don't use 'traditional' starter motors in these situations," he explained. "The starter used for start-stop systems combines several technologies."

(1) The gear ratio from the starter-drive pinion to the flywheel ring gear is optimized to make the starter's motor turn more slowly. This can be done without materially changing the design of the transmission or flywheel at all on existing designs.

Crucially, this reduces starter-motor speed (in RPM), since 90 percent of starter-motor brush wear occurs not during cranking, but during the coast-down after the start has finished. If a higher-torque motor can spin more slowly, its coast-down time is shorter, increasing its longevity.

(2) The composition of the carbon and copper brushes on a start-stop motor differs from its traditional counterparts to increase longevity without accelerating the wear on the commutator.

(3) Rather than rely on oil-impregnated bushings for the rotating assemblies, start-stop starters mostly use needle bearings.

(4) The solenoid on start-stop starters decouples the mechanical action of engaging the drive pinion into the flywheel from the electrical action of stopping and starting the motor.

This allows for a dedicated design to turn power on and off to the motor, optimizing contact design and wear, against contacts that have to be integrated as part of a spring-loaded plunger.

This also reduces the electrical load requires to turn the engine, so that there is enough current available for accessories/lighting to operate during the start event.

(5) Finally, start-stop motors are integrated with other technologies that identify when each cylinder of the engine will reach top-dead center.
That lets the fuel injectors pulse and fire during the middle of a complete rotation of the crank, against having to wait for a complete revolution that lets the first cylinder reach that position to start the fuel-spark timing sequence.
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As a person who works on and has worked on various automotive electric systems for years, starters, alternators, and other fun stuff - he's on-target here. Don't worry about that starter - even before ESS starters were lasting over a lifetime IF the owner wasn't an idiot and failed to maintain the vehicle or insisted "just 2 more seconds, I know it will start" and keeps cranking until it does. Man, people fry things by being impatient (which is likely where some of the hate for ESS comes from - loss of control, impatience - want to be spinning tires before the next guy can move!)

I'm reminded of the "spaghetti noodles" CJ owners all complain about, tearing everything out from the engine to the canister to the tank. Then spending all sorts of effort trying to figure out why the garage reeked of fuel, why their engines ran rough when cold, or stalled at turns.

These things have a purpose, even if we don't understand what they are. Those who took the time to learn the purpose of each of those "spaghetti noodles" had a better appreciation for the system. Sure it may not save you or me much, but count all the cars on the road - it adds up.

 

[ShadowsPapa]

There you go.

I'm reminded of the "spaghetti noodles" CJ owners all complain about, tearing everything out from the engine to the canister to the tank. Then spending all sorts of effort trying to figure out why the garage reeked of fuel, why their engines ran rough when cold, or stalled at turns.

These things have a purpose, even if we don't understand what they are. Those who took the time to learn the purpose of each of those "spaghetti noodles" had a better appreciation for the system. Sure it may not save you or me much, but count all the cars on the road - it adds up.

Count the lanes of this typical city street - this is SLOW TIME - normally there are cars in pretty much every lane. There's a reason there's half a dozen lanes each direction.
Note the crosswalks. The one you see the most of is for the foot traffic coming toward you - the other you see little of is for traffic going away from you and yes, they are often full - both ways.

The other is a view of typical traffic in another city - it's not always easy to see for some reason, the air seems a bit heavy............

 

[Munkey Boy]

Kinda tangent of topic here seeing OP is in Louisiana (mostly below sea level ), but one of the conditions ESS disables is "high altitude". How high? I'm at 6200 and drive to work at 6700, I turn off the ESS but have forgotten on occasion and noticed it didn't engage. I also don't have my doors on so there are all kinds of electronics disabled and I just figured it fell into some category there AND the only thing I stop for is the third deer following her idiot buddies. No stop signs or lights. But seriously, anyone know what altitude?

 

[ShadowsPapa]

Kinda tangent of topic here seeing OP is in Louisiana (mostly below sea level ), but one of the conditions ESS disables is "high altitude". How high? I'm at 6200 and drive to work at 6700, I turn off the ESS but have forgotten on occasion and noticed it didn't engage. I also don't have my doors on so there are all kinds of electronics disabled and I just figured it fell into some category there AND the only thing I stop for is the third deer following her idiot buddies. No stop signs or lights. But seriously, anyone know what altitude?

So you are asking this old hippy how high is high?

 

[Munkey Boy]

So you are asking this old hippy how high is high?

Dave's not here, man.

 

[ShadowsPapa]

Dave's not here, man.

Reminds me of a Moody Blues concert years ago. Graeme Edge had turned 70 that week. He came out and made some comment about it, then said "it's ok, it means I've lived through the 60s twice".

 

[arneb04]

I don’t mind ESS like many here I guess. I have never dealt with it, but heard only negative opinions. My guess is that people who don’t like it express such opinions and people who don’t mind it don’t say much about it. I was inclined to not like it at first but I have given it a chance at least. I don’t really notice it, so I’m becoming more and more curious about what exactly people don’t like about it other than they have a fear of this or that breaking or concerns about this or that going bad. Well. Do they break or go bad? I don’t know. But in everyday driving I haven’t found any reason to dislike it or rave about how great it is. It’s there and so far it operates.

 

[ShadowsPapa]

I don’t mind ESS like many here I guess. I have never dealt with it, but heard only negative opinions. My guess is that people who don’t like it express such opinions and people who don’t mind it don’t say much about it. I was inclined to not like it at first but I have given it a chance at least. I don’t really notice it, so I’m becoming more and more curious about what exactly people don’t like about it other than they have a fear of this or that breaking or concerns about this or that going bad. Well. Do they break or go bad? I don’t know. But in everyday driving I haven’t found any reason to dislike it or rave about how great it is. It’s there and so far it operates.

You can control it to an extent with brake pedal pressure and brake use.
My wife has had multiple Grand Cherokees with it, she likes it as she can actually tell the difference in mpg (she had batteries go bad in one last summer) and she noticed the difference but then she watches her mpg to the tenth of a mile.
It works, it doesn't bother me, if I need to I can still take off from a light and beat the next guy over when his lane ends. I just watch the lights - it's called paying attention.

 

[cb4017]

OP, maybe I missed it but do you have a manual transmission?

 

[Jas504]

OP, maybe I missed it but do you have a manual transmission?

Auto trans.
Like I originally said, i totally love my truck.
Favorite vehicle I have ever owned.

 

[ShadowsPapa]

OP, maybe I missed it but do you have a manual transmission?

Yeah, we know the situation is totally different with those.

 

[j.o.y.ride]

I can easily afford +3% on my gas bill to not deal with the annoying start stop. That hood pin got unhooked very quickly, and aux battery bypassed too for good measure. The Avenger's A on the dash is welcomed.

 

[JDMRN81]

Mine has worked only once since I’ve gotten it almost a month ago. My cluster shows the message about cabin heating or cooling. My AC is not set to LO either. Messed around with brake pedal pressure as well. I’m not mad because I don’t love (or hate the ESS).

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