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2019 Sorento EX V6
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928 Posts
Solved, sort of.
Turn off auto climate control (turn off the AC).
You will feel much better acceleration and smoother power.
The 2019 has a different system than my old 2016. On that one, the AC light would rarely come on unless I went all the way down to LOW.
On the new one, at 55 degrees outside and 67 on the dial, the AC shows on.
I had a Honda Civic, on which the AC SUCKED. BUT, on acceleration the compressor would shut off, sending max power to the wheels.
Kia could do this with software probably, but be careful what you wish for.
The Sorento has great AC. I would not mess with it.
Once the weather gets cold and you can run with heat and not AC I think you will see the difference in both performance and MPG.
 

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2019 Kia Sorento Ex
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180 Posts
I have a new EX V6. There is a little chugging at those speeds in ECO mode, and Smart too. I just leave it in Comfort.
Keep in mind, the torque peak is at 3500 RPM, so at lower speeds and gears it has less torque than the turbo for example, which peaks at 1700 RPM.
So the simple answer is probably downshift, or give it more gas pedal, and stay out of ECO except on the highway.
I had the same experience in my 2016 SX. I just changed my driving style to make it work.
Remember, this is a 4000 pound plus vehicle, it will never perform like a Hemi charger.
But since I am used to it, it really does not bother me. I just know when to give it more gas and the car responds properly.
I believe that peak torque in the 2019 EX 3.3L v6 is at 5200 RPM.
 

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2019 Sorento EX V6
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928 Posts
I believe that peak torque in the 2019 EX 3.3L v6 is at 5200 RPM.
Should be 3500. You will almost never see 5200 RPM in this car.

You are correct the official spec is 5200.
Pretty sure my 2016 was 3500
 

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2019 Kia Sorento Ex
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180 Posts

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2019 Sorento EX V6 AWD
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140 Posts
I believe Kia/Hyundai replaced the 3.5L v6 with the 3.3L sometime around 2014/15 and it has had pretty much the same HP/torgue rating since it's introduction. With only 252 lb-ft at a rather lofty 5300 rpm, it'll be good to have all those gears.

My 19EX V6 exhibits the same miss/hesitation/stumble that most everyone else seems to notice. On mine it's most noticeable for a while just after starting the engine and from about 1000 to 2000 rpm. However, it seems to smooth out a lot after having a good chance to reach normal operating temperature, about 15 - 20 minutes, even though the temp. gauge will show normal op. temp, way earlier. And it always seems less noticeable in SPORT mode. Because of that, I just wonder if it might not have something to do with different engine operation/mapping in the different drive modes, especially in SPORT. I'll have it checked at the first oil change in about 8-10 weeks.

BTW, if anyone is interested in fairly detailed specifications of their Sorento, or most any other car for that matter, check out this link: http://www.automobile-catalog.com/make/kia_usa/sorento_3gen_na/sorento_3_2_4wd/2019.html
 

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2019 Sorento SX L (FWD)
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421 Posts
I've only noticed it (just barely perceptible) on the very first upshift after going into Drive after backing out of the driveway.
Interesting to see if the coming cooler weather makes it more noticeable.
 

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2019 Sorento EX V6 AWD
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140 Posts
Turn off the AC and see what it does.
Seems no such luck in my case. Just seems a little better/less noticeable in Sport mode and pretty much gone in all modes after a good warm up period. Will have it check anyway at first service.
 

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2019 Sorento EX V6
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928 Posts
Seems no such luck in my case. Just seems a little better/less noticeable in Sport mode and pretty much gone in all modes after a good warm up period. Will have it check anyway at first service.
If it disappears after warm up it is a computer issue (programming).
Cars with carbs used to act that way, but on modern cars with fuel injection the computer adjusts the spark and mixture to make it run perfectly all the time.
 

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2019 Sorento SXL
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137 Posts
I have the same Problem /hesitation issue with my 2019 LX sorento...It started when it had about 500km now I have 3000KM..I also feel it when it comes to a incline the tranny must drops down into another gear causing the hesitation... So there must be a problem at the manufacturing end because not everybody is experience the same problem..I,ll file my complaint with Kia Canada
Is yours a V6 or V4?
 

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2019 Kia Sorento LX 3.3 Lt
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42 Posts
Is yours a V6 or V4?
Hi Phil;;;;;Its a V6.. I wounder if others are having the same issue with the 2.4 Lt... this my first Kia ..did a lot of research before I purchase it..But this problem got by me..not a happy camper just hope it does not lead to a bigger problem: :)(
 

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2019 Sorento SXL
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137 Posts
Is yours a V6 or V4?
Hi Phil;;;;;Its a V6.. I wounder if others are having the same issue with the 2.4 Lt... this my first Kia ..did a lot of research before I purchase it..But this problem got by me..not a happy camper just hope it does not lead to a bigger problem: (<img src="http://www.kia-forums.com/images/Kia-Forums/smilies/tango_face_sad.png" border="0" alt="" title=":(" class="inlineimg" />
The V4 uses the older 6 speed transmission.

For others with this issue, is it really a showstopper?
 

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2018 Sorento LX V6 AWD Conv. Pkg. Tech Pkg.
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201 Posts
Has anyone with this issue tried a firmware update for the ECM? Others have posted here that that fixed their rough shifting transmissions.
 

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2019 Sorento EX V6
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928 Posts
Has anyone with this issue tried a firmware update for the ECM? Others have posted here that that fixed their rough shifting transmissions.
My 2019 EX works fine. I keep it in "comfort" and I do not notice this at all.
 

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2019 Sorento EX V6 AWD
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If it disappears after warm up it is a computer issue (programming).
Cars with carbs used to act that way, but on modern cars with fuel injection the computer adjusts the spark and mixture to make it run perfectly all the time.
Thinking along that same line, computer, software, sensor, etc. Such a minor issue now I'll just have it checked at first service. Just a bit frustrating to think it might be one of those "problems" that they can't find or will say is "normal", we've all been there! We'll see!
 

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2019 Kia Sorento SXL; 2019 Kia Sportage SX Turbo
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2019 Kia Sorento SXL V6 engine stumbles

I have this issue as well. Going back to Kia Dealer tomorrow for the second time. My symptoms and diagnosis below:

• The engine stumbles (misfires/vibrates) on light acceleration since delivery when the engine is not fully hot and up to temperature, and continues to do so now with 2850 miles on the engine.
• On the advice of the service manager, only Chevron fuel has been used for the last 2000 miles.
• The car has recently gone 1500 highway miles at varying engine RPMs
• As an experiment 2 tanks of mid grade 89 octane fuel were used.
• None of the above has altered the cold engine stumbling/ vibration at light acceleration.
• The stumbling problem goes away when the outside air temperature in below 50 oF.
• This is the second complaint about this issue with this vehicle.
• This issue negatively affect the cold engine drivability of the vehicle
 

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2016 Sorento SX-L, 2018 Stinger GT2
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55 Posts
I have this issue as well. Going back to Kia Dealer tomorrow for the second time. My symptoms and diagnosis below:

• The engine stumbles (misfires/vibrates) on light acceleration since delivery when the engine is not fully hot and up to temperature, and continues to do so now with 2850 miles on the engine.
• On the advice of the service manager, only Chevron fuel has been used for the last 2000 miles.
• The car has recently gone 1500 highway miles at varying engine RPMs
• As an experiment 2 tanks of mid grade 89 octane fuel were used.
• None of the above has altered the cold engine stumbling/ vibration at light acceleration.
• The stumbling problem goes away when the outside air temperature in below 50 oF.
• This is the second complaint about this issue with this vehicle.
• This issue negatively affect the cold engine drivability of the vehicle
I would assume faulty fuel injector(s) or bad coil pack(s)...I'm guessing no CEL?
 

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2019 Kia Sorento LX 3.3 Lt
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42 Posts
Hesitation Issue

I purchase a 2019 LX 3.3 lt in Nov; & it was OK until it had about 800 km & it stared to do the same thing, does not matter what mode I had it in, it is noticeable even going up inclines .I complain to the Kia Canada there said that they have no issue/info; on the problem & referred me back to the dealer & said that any diagnostic work would be my responsible $$$ so I file a complaint with transport Canada saying that it could become a safety problem they have not reply back as yet, also I notice on the U.S. Gov; NASTA there are 5 complaints filed about the same issue..so let keep posting any new info; that my come up about this issue
 

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2019 Kia Sorento SXL; 2019 Kia Sportage SX Turbo
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2019 Kia Sorento SXL V6 engine stumbles

I would assume faulty fuel injector(s) or bad coil pack(s)...I'm guessing no CEL?
Correct no CEL. Also, fuel economy 22.6 @ 80 MPH on highway. same as my 2016 Sorento, same engine 6 speed trnasmission
 

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Sorento LX V6 2018
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778 Posts
If it's not tripping a CEL then take a code reader and see if there is a pending code for a misfire. If not, it's not really misfiring, just stumbling under acceleration. I'm sure that Kia is working on a software solution since that should be all it takes. It sounds like the 2019 w/8 speed is trying to momentarily retard the timing for the shift and getting it wrong. Very simple map change for someone to write and send out to the dealers but they may be waiting until they've gotten enough little annoyances to clear up and then do them all at once.
 
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