Loss of Power

[Etnad]

In the past couple of months since mounting Kia proprietary winter wheels (hub-centric) and rubbers from the Kia 2019 catalogue, anytime in Sport Mode and occasionally in Comfort my 2019 GT AWD Limited looses power when hard accelerating from a full stop/light/etc. RPMs remain the same but the loss of power is scary, unpredictable and unexpected. I throttle down and it goes back to normal.
Have run it without the 'extra' goodies inserted and with engine warmed up (travelling for abt 12-15 minutes) and above half full gas tank (always on Premium gas). Kia dealership unable to troubleshoot, said something about oil temp and such (so what happens when it gets warm here in Canada!?), and now Kia Canada says it's the winter wheel package (their product for the Kia Stinger alone!!!). So what's the solution to his scary problem. For Kia Canada is to wait until I re-mount the Staggered wheels for the summer months and then push it as much as possible to see if the problem repeats itself. I need to ask the Stinger community if this problem has touched other owners, it the wheel package excuse can be consider valid, or is there some other technical reason. Only other thought was the safety features - but I disengaged these during testing...
Help Please and thank you...

 

[NS_Stinger]

Are you sure its not just traction control? Have you tried disabling that to see if that solves it?

 

[NS_Stinger]

Also you may have noticed it got worse with your winter tires because they break loose a lot easier than the factory Michelins and are also probably 225 wide in the back versus the factory rear 255's and are a rubber compound with a lot less dry traction. Is this your first car with lots of power? What youre describing sounds exactly like traction control which basically cuts your throttle on and off to maintain traction.

 

[Doel]

yeah.... sounds like it's just your traction control kicking on since you have less grippy tires on now.

 

[MerlintheMad]

Help Please and thank you...

I can only echo "traction and stability control". I've noticed that if you thump into a gutter out of a side street or parking lot, and turn right and hit the go pedal all at once, while the rear wheels are still negotiating the uneven surface imposed by the gutter, that full power will not kick in until both rear tires are firmly planted beyond the gutter. And drivers complain about this. Heh! If you want to not engage the TSC they are easy to turn off. And the "problem" will go away.

Welcome to the forum, btw.

 

[TonyP]

In the past couple of months since mounting Kia proprietary winter wheels (hub-centric) and rubbers from the Kia 2019 catalogue, anytime in Sport Mode and occasionally in Comfort my 2019 GT AWD Limited looses power when hard accelerating from a full stop/light/etc. RPMs remain the same but the loss of power is scary, unpredictable and unexpected. I throttle down and it goes back to normal.
Have run it without the 'extra' goodies inserted and with engine warmed up (travelling for abt 12-15 minutes) and above half full gas tank (always on Premium gas). Kia dealership unable to troubleshoot, said something about oil temp and such (so what happens when it gets warm here in Canada!?), and now Kia Canada says it's the winter wheel package (their product for the Kia Stinger alone!!!). So what's the solution to his scary problem. For Kia Canada is to wait until I re-mount the Staggered wheels for the summer months and then push it as much as possible to see if the problem repeats itself. I need to ask the Stinger community if this problem has touched other owners, it the wheel package excuse can be consider valid, or is there some other technical reason. Only other thought was the safety features - but I disengaged these during testing...
Help Please and thank you...

I have the same issue with my winter rim in my 2018 Stinger GT Limited. Dealer couldn't figured out what was going on. Kia Canada recommended and replaced the engine block because the compression test failed. They replaced the engine block but the problem persisted.

I tried with oem rim and tire and traction/stability turned off. The problem persists.

I got so frustrated that I traded 2018 in for a 2019 Stinger Limited. And my new car is doing the same thing.

Did you find a fix for it?

Please help and thank you.

 

[MerlintheMad]

Hi. Are one post enquiries attracted to this thread? On the same once-off issue? The first one was weird. Two claiming the same problem is just weird. "Replaced the engine block"?! That's a first! I think your story is incomplete to say the least. I have to wonder if some kind of unusual driving style is affecting this.

 

[Soca Boy]

I have the same issue with my winter rim in my 2018 Stinger GT Limited. Dealer couldn't figured out what was going on. Kia Canada recommended and replaced the engine block because the compression test failed. They replaced the engine block but the problem persisted.

I tried with oem rim and tire and traction/stability turned off. The problem persists.

I got so frustrated that I traded 2018 in for a 2019 Stinger Limited. And my new car is doing the same thing.

Did you find a fix for it?

Please help and thank you.

Does it drive normal with the summer rims and tires?

 

[KboyJ]

Size of tour winter tires? Awd wheels and tire diameters need to be within +-1% or your TC will start freaking out.

Also, stingers and g70 here in Korea are running into bad fuel pumps and filters very early on. Might wanna check this as well.

 

[G-486796]

Same problem , 2018 , stock wheels and tires ... hard acceleration and just quits ... not traction control ... took a mechanic for a test ride to show him and he was speechless, turns out they could replicate it on another 2018 on the lot . No word from Kia on it other than maybe an update will come along ....0-60 in nope ....

 

[Marek]

Same problem, 2018. Summer time, michelin pilot sport 4 tire...central europe.

 

[Hacksaw907]

I can't say I've had this happen to me on stock, but it has happened when I used map 7 on the racechip. I dropped it down to map 5, and it works fine, so I'm thinking it's likely a misfire triggering limp mode. I'd recommend getting them to check out your spark plugs to see if they look okay - going to check mine this weekend.

 

[Marek]

It's the premium fuel. Hi octane...

 

[Spaceme17]

Clearly, it’s the engine block that is faulty. Easy fix.

1-post drive-by posters and then never come back. Frickn’ trolls.

 

[Hacksaw907]

Well, I can vouch I'm not a troll, but I do have an update; my issue was likely overboost, at least for me and the racechip. Switched out to a Jb4 with the ewg connectors, and it runs like a dream, and the person I gave the racechip to hasn't observed the same issues I had. I also met another person who had a jb4 with similar mods, but no ewg connectors, and he was running into the same issues as me with the racechip. No hate for racechip though, as it is very likely the tune they have was only meant for a stock car, which mine is anything but (the new owner of my racechip is stock).

For the OP, if you're running bone stock, I'd guess it's either octane or the spark plugs/coils. The loss in boost is very likely limp mode, which can be triggered by fuel knock or a misfire due to a bad coil/spark plug. I'd try using up your entire fuel tank, and filling up with shell 91 or pc94, to rule that possibility out. If that doesn't help, take it to your dealer and ask them to check the spark plugs/coils out.

 

[Oryan]

Racechip themselves have said they're more aiming to make a stock car just a bit faster, and less towards pushing the envelope like others may..and that's perfectly fine if that's your goal.

That being said since it's cooled off my car has been, what I'm now convinced, is overboosting. The overboost and turbine overspeed codes it finally threw a couple of weeks ago helped confirm that. Car goes, then just dumps boost. And it's not pulling now like it was in the heat of summer, at least not consistently. Fedex needs to find my damn plugs but in the meantime, I'll see if Map 1 with EWG control can rectify the boost issues.

 

[BlkKnight]

Morning all,


Just wanted to say I have the same problem too it's a late 2019 GTS (UK Spec).

I have a section of road near me which is a fairly steep incline.

When travelling at circa 30-40 mph and I go to around 1/2 throttle it feels like the gearbox dithers, changes to a lower gear and sits there. I maintain a constant speed with no acceleartion - but do experience a slight deceleration on the initial hesitation. By all rights I should be accelerating up nicely.

It's reproduceable.

I've not experienced it on the flat (yet).

In addition, when in manual mode, I notice a big hesitation around the 4k mark - if pushing hard the bonnet dips under the declaration.

Is there a way to get a light on the dash to see when traction control kicks in.

Interestingly:

www dot caradvice.com.au/894288/2020-kia-stinger-recalled-with-fuel-pump-fault/

www dot car-recalls.eu/recall/kia-stinger-2020-fuel-pump/

 

[Sypsy]

I'm in Vancouver Canada, 2019 GT limited. Completely stock. I'm always using shell 91, never noticed any knocking. This happens to me, both on stock and winter wheels (michelin PA4). Usually on hard turns and sometimes in a straight. Usually I drive in comfort, so I assumed it was a mode thing, but then I was on sport mode for a bit tonight. Today it happened out of a light when I accelerated hard, maybe 3/4 throttle. (yes, it was aggressive, but open road at night isn't common for me these days)

I'll notice if it happens going up hills, and I'm not really keen to turn off traction if that's the solution.

 

[Sanjay R]

Stock I've had this random power loss once in a while, most of the time it was while full throttle and hitting a bump, I blame it on the aggressive TCS. I think the issue is split between poor fuel quality and aggressive TCS..... When I drove across the country and had access to 93 octane, no issues.... California piss gas is a different story and most people don't realize just how bad california gas is until they get real 93 octane. Try adding a can of boostane or VP octanium to your next tank.... That's a sure fire way of knowing if it's a gas issue.

 

[BlkKnight]

Randomly it seems to have stopped happening now?

Try as I might, I can't get it to reproduce. The only difference is I have a full tank of fuel. I'll wait until I near empty and see how it goes.