NHTSA Complaint #11413679 — 2017 HYUNDAI SONATA

HAD OPEN RECALL ,, AN ECM UPDATE AND WILE HYUNDAI IN COLUMBIA CT. AND AFTER IT WAS DONE THE CAR WORKED FINE FOR ABOUT A WEEK , NOW I'M LACKING ACCELERATION FOR MILES PER GALLON HAS DECREASED 50% BURNING GAS QUICKLY PLUS IS BURNING ABOUT A QUART OF OIL A WEEK, BUT THERE'S NO CHECK ENGINE LIGHT, CHANGE THE SPARK PLUGS AND AIR FILTER STILL THE POWER HAS DECREASED 30%. I NOTICED THAT DECREASE IN POWER WHEN ENTERING ON TO A HIGHWAY AND I TRIED TO ACCELERATE INTO TRAFFIC BUT IT DID NOT HAVE ANY POWER AT FIRST UNTIL IT STARTED BUCKING AND THEN IT'S FINALLY GETTING SOME MOMENTUM. THE SPARK PLUGS WERE CHANGED BUT THE PROBLEM STILL PERSIST! STILL AT THIS TIME THE PROBLEM IS UNKNOWN TO ME