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Random misfire

This is a discussion on Random misfire within the Introductions forums, part of the Hyundai Veloster Turbo category; Originally Posted by Richard 5703 Nothing wrong with these, but they donít last long and you didnít say how long you ran them for. I ...

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  1. #11
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    Quote Originally Posted by Richard View Post
    5703
    Nothing wrong with these, but they donít last long and you didnít say how long you ran them for.

    I had these in when my second custom dyno tune was done, 45 dyno pulls with boost cranked up.

    The 5702 & 5701 are slightly more robust but after all these years, these are backup plugs at best.

    What is the Bosch plug part number?

  2. #12
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    '14 VT Vitamin-C base manual
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    dealer's got em...
    2012 Boston Red Veloster NA Base Manual BTRcc tuned 167whp / 138wtq SOLD! - TK.COM CAI/catback - Nameless poly motor mount - BTRcc 89 octane tune

    2014 Vitamin-C Veloster Turbo Base Manual
    K&N panel filter - Nameless poly motor mount - Curt hitch - CF filler cap - Hawk ceramic pads - PMS torsion bar - UNIQ front strut bar - DZIII tires

    2001 Emerald Green Kia Rio Manual
    Overhauled suspension - H&R springs - 1Gb control arms / torsion rods - A6D 1.6L DOHC swap complete!

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    Ya dealer has plugs, internet has them, and many parts stores have NGK plugs.
    '15 Auto VT

    PB's with slips and video:

    60' ET 2.05
    1/8 ET 8.70
    1/8 MPH 85.68 MPH
    1/4 ET 13.421
    1/4 MPH 105.57 MPH

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  5. #14
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    Dick
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    Had them in for about 50,000klms. They failed somewhere around 40,000klms when I noticed rough idle and low turbo boost. And ya the dealer has ngk but have to order. To expensive for fuck all. Bosch 9686 is fine. Runs awesome again.
    Last edited by Richard; 12-18-2018 at 09:28 AM.

  6. #15
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    '14 VT Vitamin-C base manual
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    yeah well we will see...
    E9C900A likes this.
    2012 Boston Red Veloster NA Base Manual BTRcc tuned 167whp / 138wtq SOLD! - TK.COM CAI/catback - Nameless poly motor mount - BTRcc 89 octane tune

    2014 Vitamin-C Veloster Turbo Base Manual
    K&N panel filter - Nameless poly motor mount - Curt hitch - CF filler cap - Hawk ceramic pads - PMS torsion bar - UNIQ front strut bar - DZIII tires

    2001 Emerald Green Kia Rio Manual
    Overhauled suspension - H&R springs - 1Gb control arms / torsion rods - A6D 1.6L DOHC swap complete!

  7. #16
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    Quote Originally Posted by Richard View Post
    Had them in for about 50,000klms. They failed somewhere around 40,000klms when I noticed rough idle and low turbo boost. And ya the dealer has ngk but have to order. To expensive for fuck all. Bosch 9686 is fine. Runs awesome again.
    If you have a VT those are no good either. Mediocre design and incorrect specs.

    Need a heat range 8 or 9 plug not a 7. Neeg gap of .028" or slightly less on all plugs and the same gap on all plugs. Not .04" gap area.

    This is like a VT coil going bad and replacing with coil from a V which is the incorrect specs and weaker.....
    '15 Auto VT

    PB's with slips and video:

    60' ET 2.05
    1/8 ET 8.70
    1/8 MPH 85.68 MPH
    1/4 ET 13.421
    1/4 MPH 105.57 MPH

  8. #17
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    Dick
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    Hey guys ! Well you were all correct. I'm back to the same shit at about 30,000klms.... The Bosch shit plugs are failing and one coil pack.... I will be buying ngk from the dealer. This car just hates any other plug. I have learned my lesson. First car I ever own that is so picky with spark plugs lol

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    Refer to post #6
    '15 Auto VT

    PB's with slips and video:

    60' ET 2.05
    1/8 ET 8.70
    1/8 MPH 85.68 MPH
    1/4 ET 13.421
    1/4 MPH 105.57 MPH

  10. #19
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    Dick
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    Troy lol you were right

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    Show us the resistance of your two main grounding points (strut towers). Pics of a multimeter display showing ohms for each side would be best.

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