What did you do to your Hellcat today?

[Fullinsurance-semitrailer]

Will a cylinder misfire be indicated on the display, or can it only be read via OBD? Just now on the road, after a hard acceleration and then slowing back to 50 mph (in 8th gear), there was intermittent shaking, similar to a sudden loss of engine power. The car's mileage is 17,300 miles, using 91# gasoline. Do I need to check the spark plugs? Thank you all.

 

[1971demon]

Did it then go back to full power....check engine lights???

 

[Fullinsurance-semitrailer]

The check engine light has been staying on—this is an old issue. The fault code only shows U113F. After pulling over at a service area, restarting, and driving smoothly for a while, the symptom disappeared. Very strange. (BTW, my car makes a very subtle rubber-like rubbing sound at low speeds, both when moving forward and reversing. We tried to locate the source of the sound; from the driver’s seat, it seems to come from the right side, but the technician in the passenger seat heard it from the left. Just now, this rubbing sound became very loud, but after driving on the highway and returning to the repair shop, the sound disappeared again.)