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  1. M

    Random misfire and Misfire cylinder 8

    Got my car back today. It was the intake manifold runner control on the secondaries. the control unit was broken, allowing more/less air into the cylinder, causing said cylinder to misfire.
  2. M

    Random misfire and Misfire cylinder 8

    Thanks for the help. Sent from my XT1650 using the svtperformance.com mobile app
  3. M

    Random misfire and Misfire cylinder 8

    Ya, completely stock. All I have is a catback. If I had it my way, they would just replace the whole engine. Sent from my XT1650 using the svtperformance.com mobile app
  4. M

    Random misfire and Misfire cylinder 8

    I have a 2017 GT with 34K miles. It is at the dealer now with the same codes thrown(P0300, P0308). Apparently, my number 2, 4, & 8 cylinders are burnt, and they need to replace the head. They are still not sure what caused it though. They are waiting on Ford to verify before fixing.

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