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Thread: If anyone is interested here is a 2013 veloster turbo Auto factory tune

  1. #21
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    What plugs and gap are you currently running? The ones in the pic look far too hot, whatever they are. You do not want white/silver deposits as seen; usually they are powdery, but it is quite bad when it gets crusty like that.

    Butt dyno is more accurate than most believe.

    Capture a scanner log and reproduce the behavior on the recall tune.

    ESC should always be disabled in dry conditions, as it is horribly intrusive. Better to improve your wheel/tire config, lower engine mount setup and alignment config to maximize traction (reduce wheel hop/spin) for your intended usage.
    Last edited by zugig; 2 Weeks Ago at 02:02 AM.

  2. #22
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    The plugs in the pic are Denso ZXU2OHCR8 iridium that were gaped to .028 when installed. I just through a cheap set of Autolite XP5703 gaped to .028 for now until I get around to ordering some hks plugs or oem ngks. Im concerned about the one plug which looks like the insulator broke partially off or melted.

  3. #23
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    That Denso plug is their heat range (HR) 20, which is equivalent to NGK heat range 6, which is stock for the 2013 VT but is way too hot.

    XP5703 is equivalent to NGK HR7. I have used them with no issues, but others have reported breakage issues with them. XP5702 (HR8) & XP5701 (HR9) have thicker ground straps and are a bit more durable (have run both) but these are temporary/backup plugs at best.

    You want a quality HR8 plug now and a HR9 plug as your tune gets fairly aggressive:

    NGK R2556G-8 (recessed tip HR8) race plug is best.
    HKS M40XL (projected tip HR8) is 2nd best.

    NGK R2556G-9 & HKS M45XL for HR9 plugs (future reference).

    Do not skimp on plugs. Pay for the better ones. Also, if you are over 40K miles on the original ignition coils, those need to be replaced as well.
    Last edited by zugig; 2 Weeks Ago at 07:21 PM.

  4. #24
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    Quote Originally Posted by zugig View Post
    That Denso plug is their heat range (HR) 20, which is equivalent to NGK heat range 6, which is stock for the 2013 VT but is way too hot.

    XP5703 is equivalent to NGK HR7. I have used them with no issues, but others have reported breakage issues with them. XP5702 (HR8) & XP5701 (HR9) have thicker ground straps and are a bit more durable (have run both) but these are temporary/backup plugs at best.

    You want a quality HR8 plug now and a HR9 plug as your tune gets fairly aggressive:

    NGK R2556G-8 (recessed tip HR8) race plug is best.
    HKS M40XL (projected tip HR8) is 2nd best.

    NGK R2556G-9 & HKS M45XL for HR9 plugs (future reference).

    Do not skimp on plugs. Pay for the better ones. Also, if you are over 40K miles on the original ignition coils, those need to be replaced as well.
    thanks! Ill be ordering new coils and better plugs soon hopefully. Then I will continue with logging and playing with the maps.

  5. #25
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    May 2019
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    So the car did it again while merging onto 295 coming home. Got into it speeding up and around 4500-5000 rpm gave it full pedal. Got a surge and then a sudden lurch and she fell on her face and the revs hung around 3500 until I let off the throttle and then I could get back on it. Not sure what its doing yet but I stopped and started logging and couldnt for the life of me get it to do it doing a few redline pulls on 295. Finally got it to do it on the last pull on the attached log. Same situation, got on it and then once it was in the higher rpm range gave it full throttle. Was a good a for a second and then it was like hitting a wall. Car fell on its face for a second and then the revs hung and would not resume normal behavior until I let off completely. No codes, no obvious miss fires its almost like the car just says "hell no". After looking at the log the only thing I can think its im hitting the rev limiter even though I have never had that problem before......maybe I am missing something. Not the TPS data on that last pull. The sudden drop to 25% from 80% is the car all on its own and then the next drop is me letting off coasting and then back on again to confirm it went away.

    7-12-19.hpl
    Last edited by VelosterJames; 1 Week Ago at 07:03 PM.

  6. #26
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    Have not looked at the log but this is classic fuel line issue on these cars from what you describe.

  7. #27
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    I suspected that too at first but now that I have logged it while its doing it I have doubts. I do not see any notable drop in fuel rail pressure while the issue is happening

  8. #28
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    Looking at the log the lambda measurement read 2.0 for a bit while commanded was still where it should be. Leads me to believe it's intermitent o2 sensor or fuel system related issues.

    On a side note not good to go WOT with the coolant and iats that hot on these cars especially if not modded and tuned properly on good fuel.

  9. #29
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    Did it again the other night but sadly I wasnt logging at the time. Its the strangest thing when it happens and this time once it happened I decided to hold it for a few seconds. No matter how much more peddle I gave it it was like the car was at a lower rev limiter. No CEL no pending CEL and the car didn't sound like it was miss firing. Im officially baffled.

    Trust me I dislike goting WOT when its this hot but the alternative is risk hitting a dear at night lol

  10. #30
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    Replace front oxygen sensor.