Here is the latest update! Replaced the fuel injector and engine misfire did not go away. Pulled the plug and ran a compression test on the suspect cylinder. 30 PSI. The failed injector probably broke the piston rings. I decided to replace the engine with a used low mileage engine from Ebay,. Found a 74000 mile Ecoboost from a 2013 Mercury. Installed this past week and the engine started on the first try. No smoke issues and 30 miles on the shake down. No problems so far. The silver Flex Unicorn is back!
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