Stinger throttle cuts under acceleration

[SRV]

I am new to the forum and am hoping I could hear from anyone else that's had this issue in Australia. I have Googled and have seen posts of the same issue in the US.

I have a 2022 GT Stinger, with K&N filter kit and GFB blow off valves fitted. I have pretty much had this issue since I bought the car last December, when accelerating from stop the car will rev and usually between 2000-3000rpm the throttle will drop for about 2 seconds and then the throttle comes back. It also happens around 5000rpm occasionally. I reported the issue to Kia dealership prior to the 3000km service and they couldn't identify the issue and on the day I was unable to replicate it.


I have since taken it for the 10000km service and the same thing happened again, unable to replicate. I managed to video the issue and sent to the Kia dealership and took my car to them last weke and they replaced the fuel pump and said it was fixed... I picked the car up and it was still doing the same thing, I took the car straight back. They had one of their technicians come for a drive and he managed to record it. They have now had the car for nearly a week and I have been asked today to remove the air filter kit and BOV.

Has anyone had or heard of this issue? I am not convinced these minor mods are the issue, especially as this is my 2nd Stinger and the previous one had the same minor mods with no issues.

Any advice or info would be appreciated.

I am sure this is NOT the typical 2022+ over-boost issue.

On my car, when it went into over-boost mode, it would lose all boost until the car was restarted.

It happened twice to me, and both times it was very cold and while under WOT. My workaround is to not floor it from a stop when it's cold out.

 

[WSTINGER]

Ok I finally was able to replicate this morning and with low throttle, at about 4000rpm you'll see and hear it drop for a second.
ht tp s: // stre am able . co m/ 50xdal
again remove the spaces as I cant post a URL correctly

any advice or help would be appreciated.
Thanks

 

[WSTINGER]

..

 

[WSTINGER]

Thought I'd update where I am at with this issue and see if anyone else has seen, heard of or experienced this.
In the latest video the traction control light is illuminating, the car was not full throttle, wheels did not spin or lose traction. This I have replicated a few times.
http s:// streamable. com/ c6wg1s (remove spaces)

I have also looked into how the TCS works on KIA's and found the following information -
The traction control system (TCS) detects if a loss of traction occurs among the car's wheels. Upon identifying a wheel that is losing its grip on the road, the system automatically applies the brakes to that individual one or cut down the car's engine power to the slipping wheel. If the wheels lose their grip on the road, it can lead the car to be unstable, resulting in a dangerous situation. Such traction loss commonly occurs on snowy or icy roads and in rainy weather.

I have passed all this info back to KIA and will do further the testing over the weekend with the TCS off when I have my car back.

 

[D.J.]

Thought I'd update where I am at with this issue and see if anyone else has seen, heard of or experienced this.
In the latest video the traction control light is illuminating, the car was not full throttle, wheels did not spin or lose traction. This I have replicated a few times.
http s:// streamable. com/ c6wg1s (remove spaces)

I have also looked into how the TCS works on KIA's and found the following information -
The traction control system (TCS) detects if a loss of traction occurs among the car's wheels. Upon identifying a wheel that is losing its grip on the road, the system automatically applies the brakes to that individual one or cut down the car's engine power to the slipping wheel. If the wheels lose their grip on the road, it can lead the car to be unstable, resulting in a dangerous situation. Such traction loss commonly occurs on snowy or icy roads and in rainy weather.

I have passed all this info back to KIA and will do further the testing over the weekend with the TCS off when I have my car back.

How do you know you are not losing traction, and the system is performing correctly?

 

[WSTINGER]

How do you know you are not losing traction, and the system is performing correctly?

Because I can give my car a flogging around the corner and lose traction and the car will act as per the below and not cut engine power.
The traction control system (TCS) detects if a loss of traction occurs among the car's wheels. Upon identifying a wheel that is losing its grip on the road, the system automatically applies the brakes to that individual one or cut down the car's engine power to the slipping wheel. If the wheels lose their grip on the road, it can lead the car to be unstable, resulting in a dangerous situation. Such traction loss commonly occurs on snowy or icy roads and in rainy weather.

 

[SRV]

In the latest video the traction control light is illuminating, the car was not full throttle, wheels did not spin or lose traction. This I have replicated a few times.

It appears that you found a big clue, the traction control light activating.

Whether it's true or not, the system thinks you're losing traction, and therefore activating the traction control, which is consistent to what you're reporting/experiencing.

Have you done a search on traction control issues? I would start there and see what people have reported.

 

[WSTINGER]

It appears that you found a big clue, the traction control light activating.

Whether it's true or not, the system thinks you're losing traction, and therefore activating the traction control, which is consistent to what you're reporting/experiencing.

Have you done a search on traction control issues? I would start there and see what people have reported.

Hey mate yeah seems a bit weird as the traction control shouldn't be cutting the power to the engine like that from what I've read..

Going to wait till I get the car back over the weekend and do further testing. Will do some further research also over the next couple of days.

 

[D.J.]

the traction control shouldn't be cutting the power to the engine like that from what I've read..

it definitely does. And its reaction time is nearly instantaneous. slight loss loss grip - cut power momentarily