Turbos disabled, then worked again on restart

[Buzzman12]

Well, I had a scary incident today. Hopefully it's not an issue, but I thought I would ask.
I have a 2023 GT Elite (Canada) and as I was driving around the neighbourhood, I pulled out from a side street onto a main street, and decided to punch it a bit.
As soon as I did that, I had to pull off the gas and hit the brakes. The engine didn't seem to like it too much. It had just started to spool up when I backed off.
After that, I had no turbos. None. Scared the crap out of me. Like , what have I done?
I pulled off again onto a side street and stopped. I shut the car off for about ten seconds, then restarted it. It went right back to normal.
There is no warning light on the dash, and everything seems fine.
Has this happened to anyone else, and is it something I should be worried about? The car only has 6,600 Kms on it (about 4,100 miles).
Thanks.

 

[bfglitch]

Hard to tell really unless there was a pending code, which would most likely be cleared by now. I know the 2022+ have a tendency to overboost in cold weather, especially with intake/exhaust mods. If it happens again grab a OBDII reader and see if there's a pending code. If it's overboost it'll be p0234 and if it happens again after you turn the car off and back on and trigger overboost again it'll actually cause a CEL to pop up.

 

[Plakchup]

That's very likely an overboost situation you had. I remember experiencing it first time too and kinda scared me for a minute.

As said the 22+ stingers stock tune has a higher chance of overboosting. Only way around it is either an ecu tune, jb4 with ewg wires (that's my current setup) or bef tune with jb4. I heard from owners taking it to stealership and basically wasted time with no solutions and giving the run around.

If you don't want to flash the ecu then have to go jb4 route. I have a 23 and had same issue. It's fairly well documented around here and jb4tech where 100% stock stingers will overboost.

Once I got the jb4 with the ewg wires hooked up and dialed wastegate adaptations ff to 50 and sometimes slightly below that I had no more overboost. Of course you get a real nice power gain as well! Jb4 is literally best bang for buck for performance. I had to do some pulls and look at logs to analyze when its borderline overboosting and adjust the wastegate settings accordingly.

 

[Plakchup]

Duplicate post.

 

[Buzzman12]

Thanks for the responses. I googled it as well, and most of the answers were the same, even for different model cars, engines etc.
Looks like an overboost for sure, and yes, 90% of the responses when I searched said the same thing about dealerships, meaning, don't bother taking it in.
I have pretty much put the car away for the winter, and it won't be driven much at all.
I only take it out on a clear day when the roads aren't salty, and so I won't be doing anything to it until the spring.
The more I read on this forum about the jb4 mod, the more I'm inclined to do it (next spring, summer though).
Just for reference, how much are these kits, and where is the best place to order?
Thanks again everyone.

 

[Plakchup]

Yup jb4 is great! You can get if from bms website here:

450 Wheel Horsepower 3.3L KIA Stinger / Genesis G70 Package

Transform your Kia Stinger / Hyundai Genesis into a 450hp beast with our simple bolt-on package! Save $191.49 or more when you purchase this package.

burgertuning.com

 

[Brotherspoon]

It's a common thing that many have encountered, like you have found out yourself by looking into it.

I think it has to do with the traction control system being disabled too, where many (myself included) would just switch it off to disable the forward collision system and get the RWD bias adjustment for sportier driving. If you do this in the colder months the likelihood of overboosting and having turbos disabled is higher. It's weird though, I have agency power intakes with ram air snorkels and now a mishimoto intercooler (larger piping) and i experienced this issue before the snorkels and intercooler (just the intake) This is when I made the connection to the traction control system. Being aware of that has made it easier to avoid this almost entirely, but it still seems weird, especially if others don't necessarily corroborate the traction control variable.

I don't have this problem now, even though I should be more prone to it due to the changes I've made to the air system. No JB4.

 

[5tinger]

Why is the overboost issue confined to the later model years?

 

[Snicklefritz]

Why is the overboost issue confined to the later model years?

The refresh changed the exhaust system, including valves in the tailpipes. There may be other contributing factors I haven't heard about.

 

[Ah GetFd]

"and decided to punch it a bit".......

I would say it was none of the above.

You gave the car heaps and it broke traction. The traction control immediately operated exactly as it is supposed to do. Killed the engine revs and Applied braking to one or more wheels.

You pulled over and surprise surprise everything back to normal. As it should be.

 

[BIG-D]

Why is the overboost issue confined to the later model years?

I'd love to know this as well... the Unichip has cured my issue thank goodness but the techs at KIA reckon they have never heard of it lol....

 

[bfglitch]

Traction control kicking in doesn't completely disable the turbos until you turn off the car, and turn it back on again.

 

[5tinger]

The refresh changed the exhaust system, including valves in the tailpipes. There may be other contributing factors I haven't heard about.

Ahh yes the updated model does increase power by 2kW, probably slightly more free flowing exhaust.

 

[BIG-D]

Mine did it as soon as I fitted the K&N filters...

I did get mine in winter tho'

 

[turboAWD]

I had a similar thing happen (first time!) in my '19 GT1 AWD at the track. 8th day at the track, running E30 and 96 octane - did not happen previous track days.

Started with jb4 map3 (have done this before, no issues), and it did it multiple sessions after 2-3 laps: floor it after a curve, bam, no power. Even after filling up with mostly 96, still did it, and then one more time a few days later on the street, just hitting it a bit. Every time, after a cool-off / restart, it came back. Could never find any codes via jb4 (was not logging at the time) or an obd2 scan tool I have. Thankfully, it feels like it still has maybe 200 hp without turbos.. I.e. not totally horrible to drive.

I've never had it before this year. On the track, I disabled traction control (but kept stability control - I want to drive home . On the street, traction was also on.

A couple of thoughts I had:
-bad gas / low octane? Unlikely - happened over several tanks/octane mixes, including race track 96, E30, straight 91, IIRC. OTOH, it did all happen within about a week, and nothing since. Not sure.
-not a '22+ which are known to be lean at times
-WARM conditions 80F+
-misfire? On old style coils (50K miles now), and HKS plugs have probably 25K miles on them now. Ordered a batch of new style coils + new HKS plugs on Black Friday, waiting to be installed.
-HPFP crash? Seems like the other reasonable candidate, although I'd driven on the track with map 3 in 100F+ weather and much harder than during this most recent day and did not have this happen. HPFP aging, less flow? Considering replacing it - will wait to see if plugs/coils fixes it.

One unknown: I think I had Pedal Commander engaged (vs. in default mode) - any chance stomping on the throttle with Pedal Commander in an aggressive mode might trigger something?

 

[Ah GetFd]

Ahh yes the updated model does increase power by 2kW, probably slightly more free flowing exhaust.

Correct. The Bi Modal exhaust increased power from 272kW to 274kW.

Bi Modal from memory.......was actually invented in Australia as an aftermarket kit basically to increase the noise for disappointed owners.....

The kit was then made standard by the Kia factory in South Korea.