2.0T Increasing fuel consumption

[7Andrei7]

Yes, but we also will fail all technical inspections..
In any case, I've been called to have the ECU replaced on the 12th. This should have the new software which is supposed to fix the problems. I have 2 major ones:
1. When the engine is cold and I put it in D or R the revs drop violently and engine almost shuts off. Then it recovers but runs very rough.
2. High fuel consumption and twitchy acceleration while car attempts to do regeneration.
I'll let you know how it goes. The fix to problem 1 should already be visible next morning.

 

[ch123]

So, I had the first appointment, becouse of the increased fuel consumption problem, kia dealer sad they checked for problems, and measured the lambda vealues, testing anywhere for faults but havent found anything. And also no available firmware update, they will send KIA a report of my case and wait for an answer from kia if they have any similar cases around.

 

[STINGERFIN]

Yes, but we also will fail all technical inspections..
In any case, I've been called to have the ECU replaced on the 12th. This should have the new software which is supposed to fix the problems. I have 2 major ones:
1. When the engine is cold and I put it in D or R the revs drop violently and engine almost shuts off. Then it recovers but runs very rough.
2. High fuel consumption and twitchy acceleration while car attempts to do regeneration.
I'll let you know how it goes. The fix to problem 1 should already be visible next morning.

Would be great if you can ask from the dealer if 3.3 GT is affected, or there is a solution for 3.3 as well. If there is a solution I will contact my dealer. Last time they said there is no solution but it was before they identified this ECU change. Thanks in advance!

 

[7Andrei7]

@STINGERFIN you have the same problems on the GT??

 

[STINGERFIN]

Issues with GPF yes. Maybe not 100% similar to what you are experiencing. There is a thread where I have discussed the issue on the 3.3. I have alias jukkak there. Sorry couldn't create a link as I'm a new member but you can put to google "kia stinger GPF light" and follow the first result.

To Summarize, I have prolonged GPF burn times where car is running lean and sort of never achieves the burn. The GPF light comes on (even when my commute is 90% highway for more than 30 minutes per direction). During this time engine is rough and does not respond. Fuel consumption was extremely high. There was an ECU software update alongside removal of the GPF which was sandblasted empty. These were done based on KIA guidance to remedy the issue.

All this happened a year ago, and the forced GPF burn got better, but it's still very bad. I'm thinking of selling the car because the GPF implementation is so bad

 

[7Andrei7]

Wow, I had no idea. I was even thinking of giving mine back and opting for the GT but it seems Kia screwed up both engines with the GPF.
I will ask tomorrow about the 3.3 as well. Your symptoms sound similar. It is very clearly a regeneration problem. I would push them for a solution if I were you. Maybe not just software to blame.
The strange thing is I was reading on the Hyundai i30N forums and while the car has the same 2.0 engine as the Stinger, Hyundai has somehow implemented the GPF in a different way because no one had any problems with the i30N. And surely there are many more of those on the road in Europe.

 

[ch123]

When I got the car back the dealer sad there was a part time solution for my problem that they will do on the 18th he sad KIA told him and I qoute " they can set my car to the 3,3 software and then they have the function to manually burn out the gpf so the computer recognizes it has done the cleaning, and then set everything back to nomral" the dealer sad that should help me for 2000-3000 km and hopfully till than KIA has a better solution

 

[7Andrei7]

So, I have the new ECU. Was produced Nov 2020. Seems like I’m the first one to get it... the first Stinger with this new software. They asked me to pay attention and provide feedback. The dealer said they asked Kia for 2 2.0 gt-line ECUs but were only sent the one for me (as I was the first to report it). Nothing about the GT V6.
First impression was that the car keept higher RPM while cruising (1500 instead of 1200) but not sure if this will stay like this. I was in Comfort.
I can feel the engine running leaner when stationary in D and foot on the brake. The changes from R to D are also leaner.
But, the real test starts tomorrow. I’ll leave the car outside overnight and will see tomorrow morning if the rought running is fixed.
As for the regeneration, this will take time to figure out. So far it was totally smooth, but it used to be on and off so I’m not getting my hopes up just yet.

 

[STINGERFIN]

Hopefully the new ECU solves the issues you are having with 2.0 engine. I'll have my thumbs up for you. Higher rpm seems strange. Could be the new ECU learning and not using the 8th gear. Otherwise the transmission would be slipping, which would be very very strange. I do believe having higher RPM will benefit the regen, so maybe the transmission is configured with higher cruising speeds when it changes gears up.

There is quite good Kia dealer around where I live. I will ask them again about a solution for the GPF on the V6 GT as it's been a while since I have asked for it.

 

[ch123]

So, I have the new ECU. Was produced Nov 2020. Seems like I’m the first one to get it... the first Stinger with this new software. They asked me to pay attention and provide feedback. The dealer said they asked Kia for 2 2.0 gt-line ECUs but were only sent the one for me (as I was the first to report it). Nothing about the GT V6.
First impression was that the car keept higher RPM while cruising (1500 instead of 1200) but not sure if this will stay like this. I was in Comfort.
I can feel the engine running leaner when stationary in D and foot on the brake. The changes from R to D are also leaner.
But, the real test starts tomorrow. I’ll leave the car outside overnight and will see tomorrow morning if the rought running is fixed.
As for the regeneration, this will take time to figure out. So far it was totally smooth, but it used to be on and off so I’m not getting my hopes up just yet.

View attachment 53995

Any news? What happend to your car?

 

[7Andrei7]

Hi! I was away, in the middle of nowhere, but I can give a partial update.
The previous 2 days the car continued to start just as rough as before the ECU change. Meaning that in P the car runs perfectly smooth. The moment I put it into D or R revs drop to 500 and the car shudders and almost dies. Then immediately it corrects to 800 and runs normal. After the engine heats up things are ok.

I had a talk with the lead mecanic and he said I need to use the car for about 10 days and only after will they consider the results. The ECU is still adapting.

Other than that, I drove about 800km in the previous 2 days. Mostly B roads, going over 100 just a few times and the average speed about 70. Consumption was super good (8,1) and the car was smooth at all times. I could not feel any regeneration happening. I had about 100km on the highway and I noticed the instant consumption was around 9,5 (cruising at 140km/h), which is higher than normal but lower than if it was in regeneration. The drive was very smooth though.

So, I hope to be able to do some more driving next week and have the final conclusions. I'm staying positive. These past 2 days reminded me why I really love the car. So fun to drive!

 

[Kris M]

Hi! I was away, in the middle of nowhere, but I can give a partial update.
The previous 2 days the car continued to start just as rough as before the ECU change. Meaning that in P the car runs perfectly smooth. The moment I put it into D or R revs drop to 500 and the car shudders and almost dies. Then immediately it corrects to 800 and runs normal. After the engine heats up things are ok.

I had a talk with the lead mecanic and he said I need to use the car for about 10 days and only after will they consider the results. The ECU is still adapting.

Other than that, I drove about 800km in the previous 2 days. Mostly B roads, going over 100 just a few times and the average speed about 70. Consumption was super good (8,1) and the car was smooth at all times. I could not feel any regeneration happening. I had about 100km on the highway and I noticed the instant consumption was around 9,5 (cruising at 140km/h), which is higher than normal but lower than if it was in regeneration. The drive was very smooth though.

So, I hope to be able to do some more driving next week and have the final conclusions. I'm staying positive. These past 2 days reminded me why I really love the car. So fun to drive!

I assume you are talking about having your foot on the brake and not letting the car move when putting it in D or R and the revs drop?
I guess that that is caused by the low viscosity of the gearbox oil when cold, making the lock-up clutch very sticky.
Now that it is colder I experience a similar drop (to about 600rpm) in revs.
Although annoying and could be improved, that would not be related to the gpf re-gen.

I do like that 8,1 l/100km !

 

[7Andrei7]

Yes, that is exactly the problem. Here is a video I tood the first morning after the ECU change. Please ignore my reactions and just listen to the engine .
My car never used to do this. This is the third winter since I bought it Feb 2019. Does yours do the same?

 

[ch123]

When I got the car back the dealer sad there was a part time solution for my problem that they will do on the 18th he sad KIA told him and I qoute " they can set my car to the 3,3 software and then they have the function to manually burn out the gpf so the computer recognizes it has done the cleaning, and then set everything back to nomral" the dealer sad that should help me for 2000-3000 km and hopfully till than KIA has a better solution

They did the manual burn out and now the car is back to normal also with 8,5l/100km while driving 140km/h they sad it should last about 2-3k km but lets see what happens, the engeneer sad KIA replyd they will do this procedure until they get the solution/update

 

[Kris M]

Yes, that is exactly the problem. Here is a video I tood the first morning after the ECU change. Please ignore my reactions and just listen to the engine .
My car never used to do this. This is the third winter since I bought it Feb 2019. Does yours do the same?

Today was the first time I had the car out since your post. I wanted to make a video as well, but somehow I opened up the camera app, switched to video and forgot to click record !
I had the car parked outside for 8 hours in 7°C. After starting the engine and waiting a minute to let the revs go down to a normal 1000 rpm while still cold, I switched in R and D.
The revs dropped to 500 for a second or 2 and came back up to 650 but no more while braking and staying in R or D.
Although it didn't feel as if it was gonna stall, it came close to that.
The car kept vibrating in an uncomfortable way, so I switched to N at a red light.

 

[7Andrei7]

Ok, so would you say it’s very similar to mine in the video?
In any case, after another few hundred more km, the regeneration problems still have not appeared. The car, once warm, runs very very smooth.
When cold, I can clearly see an improvement from the day the video was made. The first time I put it in D and R it actually keeps the revs normally. But starting with the 3rd change it drops again. Problem is I have to make a complicated maneuver to get out of my underground garage so every time I need to do R - D - R - D - R - and finally D. Next week I’ll drive down to Bulgaria for a ski trip. Hope to finish the acclimatization period of the new ECU and have final conclusions.

 

[Stan]

Ok, so would you say it’s very similar to mine in the video?
In any case, after another few hundred more km, the regeneration problems still have not appeared. The car, once warm, runs very very smooth.
When cold, I can clearly see an improvement from the day the video was made. The first time I put it in D and R it actually keeps the revs normally. But starting with the 3rd change it drops again. Problem is I have to make a complicated maneuver to get out of my underground garage so every time I need to do R - D - R - D - R - and finally D. Next week I’ll drive down to Bulgaria for a ski trip. Hope to finish the acclimatization period of the new ECU and have final conclusions.

Watch out for the speed limits here as it is full of radars and cameras

 

[7Andrei7]

I will, thanks! I’m using this route south at least once a year. Do you also have the 10% or 10km/h tolerance to the speed limit?

 

[Stan]

I will, thanks! I’m using this route south at least once a year. Do you also have the 10% or 10km/h tolerance to the speed limit?

Yes. Drop me a pm if you need guidance or anything

 

[Kris M]

Ok, so would you say it’s very similar to mine in the video?
In any case, after another few hundred more km, the regeneration problems still have not appeared. The car, once warm, runs very very smooth.
When cold, I can clearly see an improvement from the day the video was made. The first time I put it in D and R it actually keeps the revs normally. But starting with the 3rd change it drops again. Problem is I have to make a complicated maneuver to get out of my underground garage so every time I need to do R - D - R - D - R - and finally D. Next week I’ll drive down to Bulgaria for a ski trip. Hope to finish the acclimatization period of the new ECU and have final conclusions.

I'm really not sure.
Mine doesn't recover to about 850 rpm as yours does, but this might be because I only have 5560 km on the car so the gearbox oil will still be more viscous.