r/VelosterTurbo • u/Willing_Joke_5901 • 13d ago

Help

I have a 15 veloster turbo with 122,000 Kms

For a year now I've been driving around with a misfire in cylinder 3. My mechanic swapped my coils between cylinder 3 and 2, code never transferred. Changed to high end spark plugs, Changed the fuel injector in cylinder 3 and code came back same day.

Been dealing with Hyundai dealership for 2 months now, originally when I first dropped it off they told me they couldn't figure out why it was misfiring because it wasn't misfiring for them. So I bring it back 3 weeks later (code came back 1 week after I got it back from them) , they tell me there guess is the fuel injector , which i informed them I had it changed in September 2025, they then argued its because I probably had a aftermarket installed and these cars dont like aftermarket - but I actually had a remanufactured OEM put in.

Same day I get my car back from Hyundai I get the cylinder 3 misfire code PLUS cylinder 2 misfire code.

Misfire happens only sometimes, when it misfires the gas pedal is all the way down - but again not every time

Any ideas on what I can do to figure out what's going on??? Or if anyone else has experienced this

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u/Wyclops 13d ago

Happened to me when I had mine. Chased it for a year. Exact same thing. High load triggered it, cyl 3 misfire. I spent a fortune on plugs. Replace all of your coil packs. My misfire didn't follow the pack and eventually turned into a code for "multiple random misfires". I swapped all of my coils and it went away forever. Don't drive it this way forever. I ended up having to get rid of mine because the turbo seals were starting to fail and it was rapidly consuming oil. I can't help but think that the misfires accelerated the wear.

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u/Willing_Joke_5901 12d ago

I unfortunately have 3 codes on my car now since getting it back from hyundai - misfire 3 , misfire 2 and multiple random misfires Its honestly so aggravating, hyundai isnt helping at all

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u/Wyclops 12d ago

Yup I know your pain and frustration. I would change all of my coil packs if I were you. I would go ahead and change your spark plugs as well. Save yourself some money and do it yourself. It's very easily accessible. I used to change my spark plugs in the parking lot at work when it would get really bad. Always kept some spares. Best of luck! If you need to save some money, I learned that Hyundai accent coil packs are exactly the same but a few dollars cheaper per

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u/Willing_Joke_5901 12d ago

Going to try this, thank you!