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2016 Owners...how's the stop and start working?

30K views 210 replies 78 participants last post by  antjones21 
#1 ·
Just curious as to how some of you new owners are liking the stop and start feature they added for 2016.
 
#7 ·
We've had ours for 2 weeks. It is noticeable on shutdown and start up if you are paying attention for it or if you have the radio muted. I have not noticed it if my wife and I are having a conversation or if the radio is turned up at all.

However, there is one negative I've noticed. I have a tendency to pull away quickly from being stopped. I don't mean flooring the pedal but rather moving my foot quickly from the brake to the gas pedal. If I do that too quickly and the engine hasn't started fully then the car sort of shudders a little going forward, almost like a mild version of the bouncing that you could get with someone learning how to drive a manual. That being said, it is totally my fault. If you even pause just a tiny bit, half of a potato, then the car is fully started up and ready to go when you hit the gas.

Overall I'd say we really haven't noticed it after the first week. My wife was pretty apprehensive at first and considered turning it off each time she started but never did and hasn't complained about it at all since. In fact we both absolutely love the car, although I did get some dirty looks for putting it to Offroad 2 while waiting for her to come outside and get into the car. Apparently she didn't appreciate having to climb 4+ inches higher to get in. :D:D:D
 
#79 ·
I have the shudder after the engine starts from a stop. The shudder is there when I take my foot of the brake, the engine start and the car rolls in idle (the traffic in front gets going slowly). It feels like it is coming from the transmission. The oil pressure in the transmission has apparently dropped and it takes time to bring the oil pressure up to engage the clutches. I have also a car from an other make with start stop that does not have the shudder.
 
#11 ·
Yes, but it's not clear to me for some reason if it can be turned off and stay off post-shutdown.
 
#10 ·
You can also control the engine stop by not stopping if you don't press hard on the brakes when you come to a stop. I have had my 2016 Summit for two weeks now and I am liking it.


Sent from my iPad Pro using JeepGarage
 
#17 ·
Basically, in order to obtain better fuel economy, many manufacturers are using this feature. When your car comes to a red light, for instance, the engine will shut off. When you take your foot off the brake, the engine restarts.
 
#19 ·
For those of you with a '16... what kind of MPG for combined driving are you seeing. What's on your DID for MPG?

Not looking for Prius like heroics on the highway, just some real life day-in, day-out MPG
 
#21 ·
For those of you with a '16... what kind of MPG for combined driving are you seeing. What's on your DID for MPG?
For me with about 40% highway and 60% city I am getting around 20 mpg. Only have driven around 300 miles currently.

i don't know what DID means.
I believe DID means: Driver Interactive Display
 
#23 ·
Have had the start/stop on my new limited for 2 days now and one of the things I like about the way it is programmed is if you come up on stop and "roll" traffic like a long backup at a stoplight, it will shut off the engine the first time you stop. But then as traffic creeps up say a car length at a time, it doesn't keep shutting it off each time you stop after the first time. There must be programming that tells it to deactivate until you have driven a certain distance or above a certain speed limit.
 
#24 ·
I remember reading somewhere that it doesn't activate again until you get above 5 mph.
 
#28 ·
This maybe a dumb question, but is there anything different about the starter being used? Is still a mechanical starter? If so, I feel like that would be a lot of wear and tear if its not an upgraded version of the starter. I think I would prefer not to have this feature at all, and if the car has it I would like to be able to turn it of permanently and not have it reset everytime the ignition is cycled.
 
#33 ·
I agree 100%, depending on the type of stop/go traffic you travel, the starter could fail during long term ownership. It's one thing to have it replaced under warranty or extended warranty, would it be covered under the 5 year/60,000 drivetrain warranty? All for 1 mile per gallon, that is why I purchased a leftover 2015.
 
#29 · (Edited)
"At the heart of ESS is a high-speed/high-durability starter that reduces crank time, culminating in quicker restarts."

More:

http://www.allpar.com/technology/stop-start.php

The system in the JGC is presumably evolved at least somewhat based on FCA's prior experience with it in the RAM, Cherokee, and 200.
 
#30 · (Edited)
"At the heart of ESS is a high-speed/high-durability starter that reduces crank time, culminating in quicker restarts."
Ahh very cool. Thanks! I just had another thought about having the HVAC on be it A/C or heat, and having that turn off/on. Seems the conditions that the engine won't shut off if the HVAC is kind of interesting. I'm a skeptic, lol. To me its just like playing with the lights in a room, nobody likes it, and will lower the life expectancy of the light bulbs, lol! And how much fuel will you really be saving?
 
#32 ·
Ultimately this is going to become standard on most cars. As CAFE rules become more and more strict car makers are going to look for any increase in efficiency they can find. That's why Bmw, Mercedes, and Audi went to electronic steering assist despite the fact that feel suffered significantly with the change. It's been years and still the feeling is numb compared to good old hydraulic assist. However, the change was worth a couple of tenths of a percentage of fuel efficiency, which is why they did not go back. Start stop, cylinder deactivation, electronic steering, transmission decoupling (for highway coasting) are all becoming common place. I think it is a good thing. We the consumers benefit from better efficiency and car makers still make high performance, fun cars. Much better than the 70s solution of smaller displacement AND less power.
 
#35 ·
I think the starter is upgraded and intended for this type of operation, if I remember right it was supposed to handle 2 million starts or something like that. That's not to say it still couldn't fail but its not as if they are using the same old standard starter. Milous said this new 2016 v6 engine has like 80% new parts so its likely been designed around this vs just a tack on. I'm not a big fan of the stop start but from what I hear its fairly transparent I would like to try driving one to see what its like
 
#39 ·
Is the second battery AGM, and where is it located? And now two batteries to replace every 4-5 years!
 
#42 ·
Personally, if they're going to really move toward fuel savings, I wish they would incorporate plug-in hybrid technology that could allow the Jeep to make those short trips around town completely on battery power. Even if the battery range were only around 15-20 miles before it needed to kick in the gas engine, that would allow a lot of driving each week on battery power.

In my case, I live less than 5 miles from work. I could make my entire round trip commute and still stop off for groceries on the way home without touching the gas engine. Since I have a garage, plugging in overnight would be no problem for me.
 
#43 ·
I dunno about this one. Between the electric motors and batteries, that would add a fair bit of weight to an already heavy vehicle, not to mention having to find places to put those batteries. I, for one, wouldn't be too willing to lose any of the storage space I have. Once the engine has to kick in, it's going to be moving even more weight, dropping the mileage.
 
#44 · (Edited)
I have a summit 6 on order. I was worried about having another battery and the extra weight it would bring, but I looked into this. The picture I saw of the second battery shows a battery that is not a standard automotive battery but a much smaller battery. I don't believe it will add much additional weight. At least nowhere near as much as a large automotive battery would add.
 
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