NHTSA Complaint #11479868 — 2018 FORD FUSION

I am a retired mechanic with over 13 years of professional experience working at multiple dealerships. I purchased my 2018 Ford Fusion with 2.0L Ecoboost on 6/29/2022 with 73,555 miles. Two days after delivery, within 1 minute of leaving home, the CHECK ENGINE light was illuminated. When I returned home, I used my diagnostic scanner to find code P0300 set. What I found interesting is that the scanner indicated that the code had been cleared 298 miles earlier, which indicated either the prior owner cleared the code, or the dealership cleared the code prior to marketing it for sale. Two days ago, on the way home from work, the CHECK ENGINE light came on again, and I was able to determine that the code was a P0302, misfire on cylinder 2. I checked the coolant level of the car, and it was below the minimum mark on the reservoir. I removed the spark plug from cylinder #1 and cylinder #2 for visual inspection and comparison. Visual inspection of the plugs had a normal carbon build-up on the piston in cylinder #1 and on the ground electrode of the same spark plug, whereas on cylinder #2 there was no carbon buildup on the spark plug nor on the top of the piston; it was "wet looking". I reinstalled the spark plugs, and topped the coolant off and bled air out of the coolant system. I did utilize a combustion gas leak detection tester marketed by Blue Point that I have used in the past to diagnose faulty head gaskets, but the results were inconclusive. On my drive to work the next day, the CHECK ENGINE light was no longer illuminated. This morning, I examined the coolant reservoir, and there is a noticeable decrease in volume of coolant in the reservoir from the day before, along with the misfire on startup and illumination of the CHECK ENGINE light, with code P0302 being set. To date, the selling dealership and Ford have denied my request for any extended warranty assistance for replacement of the defective designed 2.0L engine. I now have a car I cannot use at all.