2016 Hyundai Equus Engine problems

Driving at 75 mph and went to pass someone. The engine kicked down a few years and the entire car shut off. No power brakes and no steering and steering locked up for about a second or two. During the time it was off the vehicle jerked hard like if the tires had locked up. After the couple seconds the vehicle turned back on and everything was normal and no check engine lights or anything to indicate a problem I was driving on the i-80 heading to reno

Vehicle produces excessive exhaust soot at all times. The soot adheres to the rear tail pipe, rear bumper, and trunk lid causing staining that leads to pitting of chrome pieces. The soot is difficult to remove after a few days and requires constant cleaning. This could adversely affect the air quality and damage or stain other vehicles and property near the rear of the vehicle, including walls and other parked vehicles. Effects on lungs should be studied to determine if permanent damage could result from...