2.0T Increasing fuel consumption

[bulldozer1984]

I average 8.0L on the motorway with my 3.3L GT ? Those 2.0L's seem thirsty !

 

[7Andrei7]

I average 8.0L on the motorway with my 3.3L GT ? Those 2.0L's seem thirsty !

What would you say your average speed is on the highway? 8L for a GT seems amazing! I get 8,4L while cruising at 140km/h. I drove for a long period in 110km/h restrictions and consumption drops by about a litre.
However, here the taxes on the 3.3 are prohibitive . You end up spending about 2K EUR more a year in tax and insurance over the 2.0 and this was too much for me.

 

[bulldozer1984]

What would you say your average speed is on the highway? 8L for a GT seems amazing! I get 8,4L while cruising at 140km/h. I drove for a long period in 110km/h restrictions and consumption drops by about a litre.
However, here the taxes on the 3.3 are prohibitive . You end up spending about 2K EUR more a year in tax and insurance over the 2.0 and this was too much for me.

Ahh ok good point. The max speed limit in Australia is 110 km/h. I usually sit on 120/110 on the motorway. So my consumption might be considerably higher at 140.

 

[Kris M]

Interesting to see another car in Belgium with similar problems. Wich dealer do you go to? Maybe we can help each other to motivate the dealers to take the problem seriously and sharing experience. Please contact me: ralfderidder@hotmail.com

I'll get back to you later and post the results of my dealer visit last monday.

 

[Stan]

I have 11k km on the 2.0 Stinger up to know and the average is 9.5l / 100, which is mixed city and highway ( 140-160km /h ).
Noted there is a difference in fuel consumption based on the selected drive mode - in Comfort fuel consumption is higher than in Smart mode with apprx 1l . Same valid for Sport vs Comfort +1l.
Smart mode engages Coasting, but also feels more responsive (throttle and gear change ) vs Comfort.
If you drive on the highway with speeds up to 110, fuel consumption is circa 8l/100km.
Did not had any issues with rpm fluctuation of GPF ( don`t know if my car has one though - it is a base model, RWD ).

 

[7Andrei7]

What year is it? I think all EU cars after july 2018 have a gpf.

 

[Stan]

just checked VIN - produced 29.10.2018
bought it from KIA new Jan 2020

 

[7Andrei7]

Same as mine. Definitely has GPF.

 

[Kris M]

just checked VIN - produced 29.10.2018
bought it from KIA new Jan 2020

How do you get the build date from the VIN?
Edit: I tried a few VIN decoder sites but got either "no results" or "invalid VIN", except one that showed the right make and model of the car and where it was registered, but to get any other info you need to pay.

 

[Stan]

How do you get the build date from the VIN?

googled “kia vin decoder” and checked first 2 links that came out - if not mistaken this data came up in partsquare site

 

[Kris M]

Concerning the increase in fuel consumption. (see also my thread Sudden increase in fuel consumption on 2.0 GDI)

My car went to the dealer last Monday, they:
- checked for any fault codes, none were present.
- checked the spark plugs. This is sensable considering the issues I reported.
- noticed an ECU software update was available and installed that.
- tested the fuel usage and reported that they had 8.6l/100km after the update.

I've no idea how they tested that, the indicated average was 10.0l/100km when I picked up the car.

I did a test drive and immediately got the feeling the update had no effect at all.
The day after I drove the car at a constant 70km/h and recorded the instrument cluster for 1m45s.
For anyone interested, I've uploaded it to YT:

You can see indicated consumption jump between 10 and 16 l/100km!

@Ralf and @7Andrei7 can you inform me if your cars do the same at a constant 70km/h on a flat road?

 

[Kris M]

I have 11k km on the 2.0 Stinger up to know and the average is 9.5l / 100, which is mixed city and highway ( 140-160km /h ).
Noted there is a difference in fuel consumption based on the selected drive mode - in Comfort fuel consumption is higher than in Smart mode with apprx 1l . Same valid for Sport vs Comfort +1l.
Smart mode engages Coasting, but also feels more responsive (throttle and gear change ) vs Comfort.
If you drive on the highway with speeds up to 110, fuel consumption is circa 8l/100km.
Did not had any issues with rpm fluctuation of GPF ( don`t know if my car has one though - it is a base model, RWD ).

You mention "rpm fluctuation", don't seem to find that in this thread. Can you tell some more about that (source?) because I might have that too.
Found it.

 

[Stan]

Post 11 of this thread if i am not wrong.
Just checked the video you posted - seems there is a slight fluctuation of rpm, while you cruise at 70kmh. Did you feel it when driving?
When new software is uploaded car will need some mileage to adapt all maps. So do not expect sudden change in consumption. Take it on a drive for 50 miles and push it via the rpm, then let it cruise again. Try smart mode - in my case consumption drops to 8-8.5
Is yours rwd or awd?

 

[Kris M]

I couldn't feel anything of those fluctuations, except for when it changed gears of course. The speedometer doesn't move at all as well.
At time of recording, I already drove it 60+ miles in varying ways and modes, including flooring it and getting to max rpm.
It is rwd.

 

[Ralf]

Concerning the increase in fuel consumption. (see also my thread Sudden increase in fuel consumption on 2.0 GDI)

My car went to the dealer last Monday, they:
- checked for any fault codes, none were present.
- checked the spark plugs. This is sensable considering the issues I reported.
- noticed an ECU software update was available and installed that.
- tested the fuel usage and reported that they had 8.6l/100km after the update.

I've no idea how they tested that, the indicated average was 10.0l/100km when I picked up the car.

I did a test drive and immediately got the feeling the update had no effect at all.
The day after I drove the car at a constant 70km/h and recorded the instrument cluster for 1m45s.
For anyone interested, I've uploaded it to YT:

You can see indicated consumption jump between 10 and 16 l/100km!

@Ralf and @7Andrei7 can you inform me if your cars do the same at a constant 70km/h on a flat road?

Indeed, couldn't get it under 10l when cruising at 70km/h. At this moment consuption is still ok. When it rises again I will go back to the dealer with a graph of my consumption and a lot of dashboard pictures as proof. I have tracked it from km 0.

 

[7Andrei7]

I've put another 2000 km on the car and no more problems so far with the new temp sensors.
And, today the service engineer called me to say KIA is working on a software update that will address these issues. It should be out sometime in October but will NOT come as a recall. So ask for it next time you're at your dealer. I'll tell you when I get it. He is supposed to call me when they receive it.

Ok, it seems the Temperature Sensors did NOT fix my problem. It's back after 4000km. However, having the dealer do a full clean-up of the filters when they installed them made the car behave like new for a few thousand km and I got a 7,9l consumption from Bucharest to Vienna. It'a 1000km, most of it cruising at 140km/h and about 150km through a mountain pass with some spirited driving. This is unbelievable as I usually would get 8,6l-9,0l on this type of drive.
So, now I am convinced this a GENERAL problem that all 2.0L with GPF have and have had since new. It's just very hard to notice it if you don't pay attention to the fuel consumption. And I think the stuttering may appear after the engine has some usage. I noticed mine at about 35.000 KM.
I confronted the engineer handling my case and he also thinks the same. We are waiting to see if this new software will fix it. Still no news on when it's out. If it does not fix it, we have a grave problem on our hands. I now truly believe there is no mechanical problem with the car. It's just the way they (horribly) designed the regeneration process.
A big red flag is that Kia announced it is dropping the 2.0L engine on the EU market starting with 2021. I think we are the only place where they had to add this GPF and can not find a way to make it work. This really sucks.
PS: Previously I had a VW Passat with the famous 2.0L DPF engine. I was so happy to get rid of that only to come to this

 

[Stan]

KIA are dropping the 2.0T engine not because the PPF, but because the new emission requirements as of 2021 + low sales.
Number of car producers ( Infinity as an example and Subaru ) will limit their presence in EU and focus on US and Asian markets.
This so called EU eco policy is just a hidden protectionist policy to defend EU car manufacturers...

 

[7Andrei7]

KIA are dropping the 2.0T engine not because the PPF, but because the new emission requirements as of 2021 + low sales.
Number of car producers ( Infinity as an example and Subaru ) will limit their presence in EU and focus on US and Asian markets.
This so called EU eco policy is just a hidden protectionist policy to defend EU car manufacturers...

I hope you are right and that they are doing it only because of the emissions.

 

[Stan]

At least this is what a friend in the dealership told me

 

[7Andrei7]

Do any of you experience any jittering or jerking when slowly lifting your foot off the brake and the car should start slowly creeping forward/backward? I started getting this more and more often, especially when in reverse. I am starting to think that the GPF issue is slowly destroying other parts of the engine. I suspect the fuel injectors.