Unhappy Hyundai ...MISFIRE & Low Power (Part 1)

This 2016 Hyundai Sonata has almost 200k miles on the clock and recently started running very poorly, misfiring on cylinder #4. Owner self-diagnosed it and had another shop change the spark plug, coil, and GDI injector on cylinder 4. Obviously that DIDN T FIX IT! Let s confirm the customer complaint and actually repair the real problem :) BONDING BRUSH (1/8" pilot): https://aircraft-tool.com/shop/detail.aspx?id=06741&AspxAutoDetectCookieSupport=1 MEGA DEAL... THINKTOOL PROS: ******TOTAL $230 OFF!!****** EXPIRES APRIL 9 2023!! https://www.amazon.com/dp/B08SWH2KP4?linkCode=ssc&tag=onamzpineholl-20&creativeASIN=B08SWH2KP4&asc_item-id=amzn1.ideas.NHZL00NIDEPF&ref_=aip_sf_list_spv_ons_mixed_d_asin TESLONG NTS 500 DUAL CAMERA BORESCOPE: *****25% OFF!!***** https://www.amazon.com/dp/B07SQ4FLYX?linkCode=ssc&tag=onamzpineholl-20&creativeASIN=B07SQ4FLYX&asc_item-id=amzn1.ideas.BH34H8T28VY4&ref_=aip_sf_list_spv_ofs_mixed_d_qv_asin Enjoy! Ivan