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It may be a small vacuum leak in the brake booster that is showing up only when the engine bay is extremely hot. A vacuum leak can cause a misfire that you can feel in the wheel. Often times you can hear a hissing sound when pressing the brake to detect this but not always.
To test this got to a large place like a mall parking lot and unplug the vacuum line from the brake booster, plug it and see if this still occurs. Please keep in mind without the booster brake effort will be increased, this is why I suggest doing it in a controlled environment.
The booster is on the drivers side of the engine firewall. I'll post a picture below showing the hose and booster.
If this is not the issue I would suggest checking the motor mounts. You can have a friend observe for extreme engine movement while the brake is held in gear and changing gears.
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Tuesday, April 23rd, 2019 AT 7:16 PM