Does anyone actually like start-stop

[Sean L]

I think you might be right once the cabin temperature cools down. I run a soft top so its like having a plastic bag over your head on hot days. I will be switching back to hard top in a few weeks and I will see if its any better. With respect to the temperature of 20 degrees. its not a programming thing but a recovery temperature most automobile AC units can't over come to easily. Now I must say the JEEPs AC is quite good so the variance might be a bit wider. I don't have any technical resource that says Jeeps is 20 degrees just from cumulative experience of working on AC units over the past several years.

ah, makes sence, If I had mine set lower it wouldn't ever calm down, but I also like it warmer than a lot of people, so i've got no issues with mine. Honestly I'd probably use the A/C a lot less if I had a soft top personally since it would be down all the time, weather permitting.

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[Sean L]

If it's my guess, I don't think it would be a specific temperature. The auto temp is designed for you to set the temperature to what you want it to be then the A/C or Heat blows colder or warmer in an attempt to hit that temperature. So somewhere there is a thermostat reading the cabin temperature and adjusting the AC or Heat to meet the temperature you have it set for. If you have the temp set at 72 and the cabin is 82 then the AC will be working really hard to reach that temp thus disabling the ESS to help reach or maintain temp. Im not sure what the variable would be for the auto temp to kick on the AC or Heat but it would be much like a home thermostat. I'm just guessing so if someone knows for sure, please correct me.

Yes I am aware of how it works, but since he specifically said 20 degrees it made me think that it was actually written down somewhere. its only a few degrees of variance as one time it cranked on the heat when it was 70 outside and I had the auto set for 75. Turned it off quickly when I realized it was blowing out hot air. lol

 

[MountainGurl]

Because exiting my street there are limited sight lines. When I hit the gas, I don't want there to be any lag. None. Zero.

And when I drive to work, which is 10 miles away, there is a tough merge onto a busy HWY with a speed limit of 65 from a standing stop. Again, I want zero lag. None. Zero.

I want my new JLUR to be the same as all my other cars I've driven for the last 30 years. I don't need assisted start-stop. I also wish my quarter ponders with cheese were still served in styrofoam containers.

Agree. You rock. A product suggestion that came up around our dinner table is a lockout function, enabled by a key like the backseat doorlocks override, plus a command somewhere preferably a button in the glovebox (or comparable) or a Uconnect screen verification. The override would turn off all of the electronic driving assist features of the car except those that are Federally required to be on at all times (oh, how I miss my '72 Toyota Land Cruiser sometimes!... except when on the highway...).

 

[MountainGurl]

My Auto Start/Stop Experience on 2018 Ford SUV

I was curious about this auto start/stop as well since I'm purchasing my Jeep Rubicon JL soon. I had a rental which was a 2018 Ford SUV with auto start/stop technology for 3 days. It actually showed me a lot of insight of it which should be similar regardless of the vehicle. I used it from anywhere to sitting in traffic for an hour to highway to regular driving on the street.

My first impression was it wasn't too noticeable first since the engine startup was quiet but when the engine cut off the headlights and everything on interior remained on as if nothing went off beside you don't hear anything anymore and when you lift your foot of the brake you hear a quick cut on of the engine. I do like to drive fast many times and even with the start/stop I seen no delay of speeding off on a green traffic light right after the car shut off to back on still took off as if it never cut off. I did notice it did help a lot with gas mileage least in that vehicle so I can only imagine in Jeep the good it can do. I found later I used the button to disable the auto start/stop and noticed the car felt....different. I had gotten use to it shutting off at lights and whenever the brake pedal was used.

Misconceptions/Questions:

When you hit the brake the engine would cut off so wouldn't it be bad for off roading?
Response: When you are driving and touch the brake the engine WILL NOT just cut off by itself. If so many people who drive "riding the brake" (pushing down on the brake while letting the car still move long distances) would hate this. What I noticed of using the vehicle auto start/stop feature it will cut off once the odometer is down to 0mph. So I "ASSUME" when off-roading and you drive 5mph and braking the engine would not just cut off the vehicle has to be completely stopped even so, it will not hurt anything.

Is their a delay when the engine cut off and back on and driving?
Response: No, actually I seen no delay at all from when I turned off auto start/stop to having it on. Seemed the same response time. So again at a stop light you pull to a red light and start braking and the odemeter goes down to 0mph then the engine turns off. X amount of time the light turns green you take your foot off the brake you take off immediately.

Have you purchased your Rubicon yet? I find your comments interesting, but uninformed by actual experience. What do you think now?

 

[MountainGurl]

My plan is to hire a monkey to press the ESS button for me every time I enter the vehicle. Problem solved.

Why have a monkey when you could have a robot?

 

[JlURT]

While you're running the engine swap for that carburated flathead v-8, make sure you forgo the electric starter entirely and put in a manual starting crank. Power steering pumps? They wear out, go for manual steering. Rubber tires? They wear out, go with wooden wagon wheels. Replace your headlights with whale oil lamps as well, so you won't have to replace any bulbs.

This one was awesome.

 

[Sean L]

This one was awesome.

lol, I was getting frustrated with the Technophobia. If someone tries it out and just simply doesn't like it? Fine. Getting preachy about how horrible it is without ever having driven one is what drives me crazy.

 

[ZEN357]

I hate start-stop as well as the MDS Chrysler puts in their vehicles. Let the car run. Starting and stopping can't be good for the engine.

 

[Sean L]

I hate start-stop as well as the MDS Chrysler puts in their vehicles. Let the car run. Starting and stopping can't be good for the engine.

MDS works great, I had a Ram 1500 for 5 years and got pretty good highway mileage with it. Start/Stop works pretty good too, and I'm getting far better city mileage than my wife (who disables ESS) when she drives the Jeep.

Neither MDS nor ESS will function until the engine is at operating temperature. ESS doesn't just do 50 cold starts on your engine at every stop sign, while your engine is still running rich and you've got cold oil getting pushed through your moving parts. The engineers have kept all of this in mind and designed it to function under specific circumstances.

 

[xeon]

Did some simple testing that everyone can try to replicate and we can see what the variance is.

Outside temp 86F. AC Auto set to 75. ESS worked no problem. AC fan speed unchanged
Outside temp 86F. AC Auto set to 74. ESS worked no problem, AC fan speed unchanged
Outside temp 86F. AC Auto set to 73. ESS worked no problem, AC fan speed changed to slightly higher output.
Outside temp 86 F, AC Auto set to 72, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 86 F, AC Auto set to 71, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87F, AC Auto set to 70, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87F, AC Auto set to 69, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87, AC Auto set to 68, ESS stops working, AC fan speed at much higher fan speed

I will continue to test but wondering if anyone else is getting similar results with a delta temp of 19F.

 

[twisty]

ESS / Auto Start Stop. it was a feature I was dreading. It was a feature that annoyed the hell out of me in the beginning. So of course i chose to shut if off using the button. Then after a few long trips and 14 and 15 mpg. I thought I would test it out and see if it would help out. Sure enough it did. Those 14 and 15 mpg trips quickly moved to 16.5 and 17.5 mpg trips. Now, I am disappointed when it doesn't engage. Little did I know that if you have Auto Climate Control on it disables the ESS. So now i try never to use Auto Climate and the ESS engages more frequently. Yay.....even better high way milage.....getting about 18.5 to 20 on long trips. So...ya....happy with it

you must have a lot of long stops in traffic driving to give yourself a boost like that. Come to think of it after reading on this forum yours is about the lowest MPG I've seen. Most on here are getting about 19 ess or not. I do in town riding mostly at 35mph

My driving is relatively traffic free, the jl is a joyride vehicle. My traffic stops 9 out of 10 times are about 5 seconds or some small number. Example I stop for a light and the ess kicks in stops the motor and seconds later the light is green and motor starts up. So it's not saving me anything, and its mildly annoying.

 

[xeon]

I commute in typical LA commuter traffic 60 miles per day, some times double :-(. My commute consists of 4 adults ... 600lbs + 200lbs of gear in a JLUR with 2" lift and 35 inch tires and soft top ( got better milage with the hard top) As far as start and stop...half of my commute is done at under 5 mph in heavy start stop, typical bumper to bumper stuff. So much so that the ESS finally gives up as the battery doesn't have time to recharge to be effective. I have consulted FCA and the dealer and this is normal. However most of my driving is done after work hours... and thats an additional 100 miles each time. On those trips... my overall MPG is at best 18 through an entire tank but my average speed is about 65mph. I can get up to 22 or even 24 for parts of a trip. But the overall average on a tank with mixed use has me at 16.7 to 17.5 depending on load, use of the AC and how many trucks I can draft behind. typically. The drafting sounds funny but when behind a semi doing about 65, I am getting 35-40mpg...so over a long distance that affects the average mpg greatly. With just me and no additional cargo the MPG goes up of course...but not a lot surprisingly. What MPG are most JULRs getting? I know with a JLU Sport I can easily get 26-28 under the same conditions.

 

[GringoStar]

I commute in typical LA commuter traffic 60 miles per day, some times double :-(. My commute consists of 4 adults ... 600lbs + 200lbs of gear in a JLUR with 2" lift and 35 inch tires and soft top ( got better milage with the hard top) As far as start and stop...half of my commute is done at under 5 mph in heavy start stop, typical bumper to bumper stuff. So much so that the ESS finally gives up as the battery doesn't have time to recharge to be effective. I have consulted FCA and the dealer and this is normal. However most of my driving is done after work hours... and thats an additional 100 miles each time. On those trips... my overall MPG is at best 18 through an entire tank but my average speed is about 65mph. I can get up to 22 or even 24 for parts of a trip. But the overall average on a tank with mixed use has me at 16.7 to 17.5 depending on load, use of the AC and how many trucks I can draft behind. typically. The drafting sounds funny but when behind a semi doing about 65, I am getting 35-40mpg...so over a long distance that affects the average mpg greatly. With just me and no additional cargo the MPG goes up of course...but not a lot surprisingly. What MPG are most JULRs getting? I know with a JLU Sport I can easily get 26-28 under the same conditions.

How many windshields per gallon riding behind those semis?

 

[GringoStar]

Did some simple testing that everyone can try to replicate and we can see what the variance is.

Outside temp 86F. AC Auto set to 75. ESS worked no problem. AC fan speed unchanged
Outside temp 86F. AC Auto set to 74. ESS worked no problem, AC fan speed unchanged
Outside temp 86F. AC Auto set to 73. ESS worked no problem, AC fan speed changed to slightly higher output.
Outside temp 86 F, AC Auto set to 72, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 86 F, AC Auto set to 71, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87F, AC Auto set to 70, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87F, AC Auto set to 69, ESS worked no problem, AC fan speed unchanged from prior speed
Outside temp 87, AC Auto set to 68, ESS stops working, AC fan speed at much higher fan speed

I will continue to test but wondering if anyone else is getting similar results with a delta temp of 19F.

I live in Phoenix, and ESS will shut the engine off at the first light after having the vehicle sit in the sun all day and the temp set to LOW. I don't think it's heat sensitive in my experience. It really frustrates me when it's 110 out and the cabin is dreadfully hot and the air gets warm from ESS stopping the motor.

 

[RussJeep1]

Best way to deal with that is to pop the transmission into neutral as you are stopping, then put into park as you are fully stopped. it avoids the unnecessary ESS shutdown and restart.

I like where you're going with that idea @Sean L in that I tend to engine break my automatic.

Under the principle that ESS doesn't engage if the automatic rig is not in automatic, be it in the neutral you describe, or a user initiate manual gear like I might on occasion access, the same is achieved.

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