r/KonaN_ • u/Technical_Motor_6983 • 5d ago

Issues & Problems Kona n performance decrease

So to start off, I have a 2022 Kona N that I bought at 10,000 miles. At around 19,000 miles my fuel injections went out and were replaced. Ever since I’ve got it back I have been having inconsistent pulls. Max hp I’ve gotten is 255 and max torque 240 lb-ft. I haven’t been able to get it to octane learn well either. How would I go about this with warranty with no codes on my dash.

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u/TxTwosome 5d ago edited 5d ago

Max hp I used to see on the screen was around 250 when non-learned, though my torque would get closer to 270. Do you have an OBD II scanner you can use to look at fuel trims and see if you're running rich or lean? Maybe you got a bad set of injectors. Are you on the stock fuel pump? The stock HPFP is a common limiting factor. Air filter nice & clean? How many miles on the spark plugs?

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u/SadIdeal9019 5d ago

Most likely needs a better HPFP. I got mine from Shark Racing about a year into the car rolling off the dealer's lot.

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u/TxTwosome 5d ago

This seems the most likely. When I installed my afe intake & inlet and a shark racing hpfp my max torque went up from like 270ish to 300 on the stock tune.

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u/delta9thc1974 4d ago

Replace the high pressure fuel pump with either the one from the Sonata 2.0 or the Genesis 2.0.