2012 HYUNDAI GENESIS COUPE Engine Problems

All maintenance done on vehicle when needed however the vehicle stalled in traffic and almost caught on fire when driving it doesn’t take off like it should now vehicle is not drivable engine failure

AS I EXITED THE FREEWAY I SHIFTED OUT OF 6TH GEAR (70MPH) AND PRESSED THE BRAKES TAKING IT DOWN TO 40MPH. THE RPMS CONTINUED TO REV UP TO 6K AND BEYOND. THE BRAKES DID RESPOND, SO I FELT THERE WASN'T IMMEDIATE DANGER. I IMMEDIATELY PULLED OVER TO THE SHOULDER AND STOPPED MY CAR BY TURNING OFF THE KEY. TURNING THE CAR BACK ON, NOT IN ANY GEAR, NOT PRESSING THE GAS, THE RPMS BEGAN TO REV JUST AS HIGH AGAIN. SO I TURNED THE KEY OFF AGAIN. I DECIDED TO TRY AGAIN, STARTED THE CAR, IT BEGAN REVVING UP THE RPMS. I SHIFTED INTO FIRST GEAR TO SEE WHAT WOULD HAPPEN AND IT BEGAN TO DECREASE IN RPM. THEN IT BECAME NORMAL. BUT NOW THERE IS A KNOCKING NOISE IN THE ENGINE WHEN I ACCELERATE THAT WAS NOT PRESENT BEFORE. IT'S LESS NOTICEABLE AT 1ST AND 2ND GEAR, BUT GETS...

WHEN MAKING A TURN AT A LOW SPEED THE CAR WILL STALL LEAVING THE POWER STEERING AND BRAKES DIFFICULT TO OPERATE AND THE NEED TO PULL THE CAR TO A STOP, PUT IN PARK AND RESTART WHILE TRYING TO AVOID AN ACCIDENT. BEEN TO DEALER TWICE WITH THEM UNABLE TO FIND ANY PROBLEM. MULTIPLE SAME STORIES ON WEB ABOUT 2009 THRU 2014 GENESIS WITH SAME PROBLEM AND NO SOLUTION. THIS HAS HAPPEN 4 TIMES IN THE LAST 4 MONTHS.