Hi Scotty. I have a Hyundai accent 2013 with 157000 kms on it. I bought from dealership. I am the second owner of the vehicle. Before a month I was driving on highway and it started to stumble . I went home and check codes. It had p0304. Went to mechanic my coils ,spark plugs, injectors, gasket everything was in good condition. My mechanic told me that 4 cylinder has no power that's why it's not running. He predicted some electrical issue. Also he changed my spark plugs and purge valve from my engine light. So now even I don't have any engine light but it still misfires same with no difference. I kept it to that mechanic again for a week and he wasn't able to figure out anything. I would like to mention that this issue happened before 2 year ago and I had to take it to dealership. They changed my corroded wire connecting ECM to cylinder 4. But currently it showing the same problem again which is hard to track and no codes on scanner. That's for sure as cylinder 4 doesn't receive any power for some reason. Please guide. Love from canada
Another case of Hyundai's quality: pure garbage.
Junk the car and move on to something else.
Those cars were not made for the long haul and the engine may well be wearing out at that age and mileage. Before descending into a maze of twisty little passages trying to find the cause of the misfire I would first confirm the soundness of the engine with compression and leakdown tests.
I have a 2008 with the same issue. Did you get it fixed? If so how or what was the issue?
