Rough Idle, Loss of engine power, and cylinder misfire on 2023 Santa Cruize Limited approx. 26,700 miles(currently) purchased new 04-28-2023 at Hyundai in North Knoxville, TN. Vehicle is stored in insulated garage at all times when not in use. 1) Approx. 2k-4k mi vehicle was having rough idling upon start up & have to sit, wait several minutes to allow vehicle ample time to warm up like a cold natured, carbureted engine. Dealer was unable to replicate at vehicle service intervals(60 miles away from home). 2) During Oct 23 approx. 24k-25k experienced 3 occurrences of loss of power while accelerating to merge into traffic, toggled through drive modes, put in manual, then back. Power came back each time. 3) 11/12/2023 Second start of the day, immediately upon startup was running extremely rough in idle, very little response. Check engine light is on, made video of issue & documented miles: 26,121. Turned off, then back on, issue was resolved. 4) 11/15/2023 26,373 miles: Second start of the day, same issue described in "#3", extremely rough idle, check engine light, & sounds coming from tailpipe that can be identified as "drone". Opened hood, inspected intake components, removed engine cover to check for burned or odd colored wires to injectors & coil packs, but no evidence of fouled or damaged wires. Turned vehicle off, then back on & the issue cleared. Contacted dealer where purchased, advised to bring vehicle in for diagnostic evaluation. 5) 11/16/2023 26,606 miles: Again, second start of the day, check engine light, extremely rough idle & louder "drone" sound. Left vehicle in the state that it was in, drove to dealer from work(25miles away) to be diagnosed while issues were occurring. While driving vehicle had very little power, experienced odor while driving, shudder, & jolting during accelerations. Diagnostic eval. revealed misfire in cylinder #3, dealer inspected coil packs, wires, & removed spark plug. Currently being serviced, issued loaner by dealer.

- Cumberland Gap, TN, USA