2008 Hyundai Sonata engine problems

“Bought in 2023 @ 98k miles. Have had trouble with 1.it would only start in drive, then that seems to have self corrected. 2. In drive, car would not accelerate properly, and would slow as though I was braking, but no foot on brake. Had rear brake sensor replaced, seemed better for a while. 3. Developed oil leak at 120 miles which valvoline characterized as "not serious...just keep checking it and topping it off." So, have been doing that. Today after oil change, it began running rough, lots of vibration, then the shifting problem, sluggishness, and new..smoke from under hood on driver's side. No check engine lights at all. Nothing registered as hot or overheating. Turned off car, checked oil and trans fluid, both in proper range for warm engine. Let car sit and cool for an hour. Decided I had parked too close to the propane tanks for a smoking car, so I decided to start car just to back it into a space across the lot. Car had no issues- No smoke, no jerking or vibration, no sluggishness, no phantom braking. This car has done this same thing about once every 6 months since I've had it. Changed a tire sensor, that seemed to fix it once. Stopped using cruise…”

“MY ERVIN CEASED UP ON THE HIGHWAY AT 60 MPH. IT THRU AN ENGIN ROD.THE ENGIN OIL MADE IT IMPOSSIBLE TO SEE ANYTHING. NOW AFTER JUST BUYING THIS CAR USED, THERE ARE NO ENGINES AVAILABLE FOR REPLACEMENT. TOO MANY HAVE BLOWN UP. AND HYUNDAI SAYS THEY ARE NOT BEING RECALLED. SAME ENGIN AS THE FAILURES WITH THE FATALITIES.I AM STUCK.”

“TL* THE CONTACT OWNS A 2008 HYUNDAI SONATA. THE CONTACT STATED WHILE DRIVING AT 55 MPH, THE VEHICLE OVERHEATED WITH THE LOW OIL LEVEL WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE ENGINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. NEITHER A DEALER NOR THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 236,000.”

“WAS HEADING TO WORK ON INTERSTATE 81, ENGINE MADE LOUD BOOM SOUND SCARED ME PULLED OVER BEING AFRAID TO DRIVE HAD IT TOWED TO AN AUTO REPAIR SHOP. NO ENGINE LIGHT ON. REPAIR DONE A DIAGNOSTIC TEST SAID ENGINE WAS BLOWN, OLL GOOD NO ENGINE LIGHT BUT ENGINE WOULDN'T TURN OVER TRYING TO DO MANUALLY. MY CAR ONLY HAD 180,000 MILES ALWAYS DID BELTS AND MAINTENANCE.”

“TL* THE CONTACT OWNS A 2008 HYUNDAI SONATA. THE CONTACT TOOK THE VEHICLE TO CROWN HYUNDAI (5301 34TH ST N, ST. PETERSBURG, FL 33714, (888) 727-9161) REGARDING THE REAR BACK-UP SENSORS AND AN UNKNOWN NHTSA RECALL RELATED TO THE ENGINE CONTROL MODULE (ECM) CLUSTER. WHEN THE DEALER ATTEMPTED TO UPDATE THE ECM CLUSTER, THEY DISABLED THE VEHICLE. THE DEALER KEPT THE VEHICLE FOR TWELVE DAYS, BUT DID NOT PROVIDE A REMEDY. THE MANUFACTURER WAS CONTACTED AND PROVIDED A LOANER VEHICLE. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 3,000.”

“2008 HYUNDAI SONATA 6CYL DOHC 3.3L / 152812 WATER PUMP WENT OUT. REPLACED IT. THEN WATER ENDED UP IN THE OIL THAT GOT INTO THE LIFTERS. ENDED UP GETTING ANOTHER MOTOR. THEN MY A/C STOPPED WORKING (DIDN'T BLOW COOL OR COLD AIR). CHANGED OIL AND OIL FILTER MYSELF ALONG WITH THE OIL SENSOR ( CONNECTED TO OIL FILTER SPOT) THAT WAS LEAKING BAD AS LONG AS THE CAR WAS RUNNING.I WAS DRIVING ON THE INTERSTATE, IN FRONT OF A LOADED 18 WHEELER, DRIVING 75 THEN MY CAR JERKED REAL HARD THEN DROPPED DOWN TO 40. I HAD TO PULL OVER ILLEGALLY TO KEEP FROM GETTING HIT BY THE TRUCK. AS I WAS CATCHING MY BREATH I TURNED THE CAR OFF. WHEN I STARTED IT BACK UP IT MADE A WEIRD TICK NOISE. HAVEN'T HEARD THAT NOISE SINCE. WHEN I PULLED OFF IT HESITATED TO CHANGE GEARS FROM 2 TO 3. IT FINALLY CHANGED AND DID NOT COME OUT OF 3RD. GOT IT TOWED HOME. HAD MY MOMS BOYFRIEND TO CHECK THE TRANSMISSION. HE DROVE IT AND IT WAS FINE. NEXT MORNING STARTED CAR AND IT SOUNDED LIKE A VACUUM CLEANER. (LOW VOLUME) FINALLY IT WENT AWAY. WHEN I HEADED TO WORK, IT HESITATED AT FIRST. THE VACUUM NOISE CAME BACK AND WAS LOUDER. THEN I SPED UP TO 50, IT HARD JERKED AGAIN, AND STAYED IN 3RD GEAR. AS I WENT…”