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Thread: S14a backfiring like an ak47

  1. #1
    Member richie s14a's Avatar
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    S14a backfiring like an ak47

    Car drives fine until you floor it then all hell breaks loose! Backfires really loud several times. Ive replaced coilpacks and coilpack loom with brand new ones and fitted a new lamda sensor which has made no differance. Car is a hdev stage 1. Anyone had this issue before or have any ideas what it could be?

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    insert sarky boost leak comment here

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    Have you tried new plugs and gapping them down to 0.8mm-0.9mm

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    Member richie s14a's Avatar
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    The plugs are fairly new only a couple of hundred miles on them, and there ngk bkr7eix iridiums. I will try a boost leak test but intercooler is fairly new and i used samco hoses with milkalor clamps and all looks fine.

  5. #5
    Total bellend sideways14a's Avatar
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    Quote Originally Posted by mikeyrs View Post
    insert sarky boost leak comment here
    b
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    i had a boost leak once and it genuinely sounded like anti lag. i loved it but the car didnt

  7. #7
    Member richie s14a's Avatar
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    It must be that then mine sounds like anti lag to. Will pressure test boost pipes the weekend.

  8. #8
    Guest ANDY black s13's Avatar
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    if you still have the soft mushy OE engine mounts the engine movement when you nail it is pulling on the joiners as the 'cooler is solid mounted
    common is hot pipe from turbo joiner comes loose but all joiners can leak tbh,can swap OE mounts for hardrace/nismo or similar

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