This issue started about a month ago. While accelerating, it feels like the power is "slipping" away from the accelerator; when I'm idling, the car is shaking in waves (coming and going) while the RPMs increase and decrease ~500rpm--idling is rough. The check engine light flashes on/off (i.e., on, off, on, off, then stays off). Occasionally, the check engine light will stay on and flash but will return to "on" after that.
This issue arose about a month ago. Here is what happened at each dealership visit (in order):
1) I took it to a Hyundai dealership, they said there was a misfire, and they reset the error.
2) Issue happened a few weeks after the first visit; I returned, and they said there was another misfire but updated my ECU (there was an update) and reset the error.
3) Issue came back less than one week after the second visit; I returned and was told there was another misfire. They ran some tests and found that the fuel failed the "water separation test" and that the fuel injector may need replacing. They advised that I put in premium fuel for the following few tanks. They drove 53 miles in the car, and the issue didn't occur again. This happened yesterday.
As of this morning, I drove ~30 miles, and the engine light is back on with all the symptoms I described above.
So now I have to bring it back for a FOURTH time. I'm not convinced it has something to do with fuel; I've owned a 2010/2013 Genesis Coupe 2.0T, and I've used only regular fuel from the same source (Kroger). My car is less than six months old (I got it in October).
This is getting frustrating. Does anyone have any idea what's going on? Similar issues? Etc?
2015 Veloster Turbo, manual.
This issue arose about a month ago. Here is what happened at each dealership visit (in order):
1) I took it to a Hyundai dealership, they said there was a misfire, and they reset the error.
2) Issue happened a few weeks after the first visit; I returned, and they said there was another misfire but updated my ECU (there was an update) and reset the error.
3) Issue came back less than one week after the second visit; I returned and was told there was another misfire. They ran some tests and found that the fuel failed the "water separation test" and that the fuel injector may need replacing. They advised that I put in premium fuel for the following few tanks. They drove 53 miles in the car, and the issue didn't occur again. This happened yesterday.
As of this morning, I drove ~30 miles, and the engine light is back on with all the symptoms I described above.
So now I have to bring it back for a FOURTH time. I'm not convinced it has something to do with fuel; I've owned a 2010/2013 Genesis Coupe 2.0T, and I've used only regular fuel from the same source (Kroger). My car is less than six months old (I got it in October).
This is getting frustrating. Does anyone have any idea what's going on? Similar issues? Etc?
2015 Veloster Turbo, manual.