2016 mustang GT misfire at Idle

Discussion in 'Issues, Repairs, Warranty, TSB, Recalls' started by danm2712, May 16, 2020.

  1. danm2712

    danm2712 New Member

    First Name:
    Daniel
    Vehicle(s):
    2016 mustang gt
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    Hello, I am currently having issues with my 2016 mustang gt automatic. So here is what is going on. In the past month when the car had 14k miles I decided to install some mods. Those were 2018 mustang manifold(locked IMRC), 2018 mustang intake, lu47 injectors and lund tune e85. Currently 800 miles on those mods.

    Within the past week the car started to act weird at idle. I first began hearing a "pop" at idle and then it progressed to a slight shake. The car still runs and drives great and pulls like normal at high RPMs. I thought it was nothing to worry about until I got a p0300.

    I have been talking to Lund, they gave me some ideas. I started by buying new plugs and gapped them to .040, then did a crank relearn, switched tunes, switched gas from e85 back to 93. I also made sure all of the vacuum hoses were tight and had no leaks. With all of this nothing has changed, I am at a loss. wondering if you guys had any ideas, thanks.
     
  2. Fredboy

    Fredboy Well-Known Member

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    Did you find what the problem was?
     
  3. OP
    OP
    danm2712

    danm2712 New Member

    First Name:
    Daniel
    Vehicle(s):
    2016 mustang gt
    Joined:
    Aug 10, 2019
    Location:
    56301
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    No, never figured it out. I did a compression test everything came back normal. My last resort was to put all the stock parts and stock tune and that completely fixed my issue. I have no Idea if the parts were causing the misfire or if the tune was causing problems.
     
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