3.3TT Car is running Lean

[Stinger85]

Hey everyone I have a 2018 Stinger GT 3.3l , I brought it with 68,000 and now I have 93,000 on it I’ve had ignition coils and HKS spark plugs installed and new fuel injectors even a new fuel pressure sensor , now who ever had the car before me didn’t fully take care of the car I’m going to assume do to the fact it has a ton of carbon buildup on the valves , car has been to the dealership 5 times I would pick it up and not even 24hrs later I would take it back they did the GDI fuel treatment and said it may take multiple treatments to clean it , car sputters and bucks at times and goes into limp mode but it’s intermittent.

I’m trying to find out if anyone has experienced this with there Stinger 3.3l ? If so please help cause I really am struggling to figure out what’s going on sad part is KIA said I’m going to have to get a second opinion cause they can’t figure it out other then it running Lean

 

[Alpinesting]

CEL ?

 

[Stinger85]

CEL ?

My apologies for not tracking what does CEL stand for ?

 

[Alpinesting]

Check Engine Light. When it goes into limp mode it will give a check engine light which results in a code that the dealer can

use a code scanner to decipher what is going on?

 

[Stinger85]

Check Engine Light. When it goes into limp mode it will give a check engine light which results in a code that the dealer can

use a code scanner to decipher what is going on?

Thank you for clearing that up for me.

Yes they claim there isn’t anything going on with it but they said get a second opinion and I have and I have and the shop keeps getting PO191 fuel rail pressure sensor even though that’s been replaced twice , so they put a gauge on it and it’s not a steady pressure, so apparently 2018 to 2023 Stinger have a recall out for the fuel system but unfortunately for mine the NTSHA says VIN doesn’t match with the recall.

I was trying to upload the video of what the gauge is showing