My car with 300 miles or so has been at service since 2-28 due to rpm hovering anywhere between 1500 to 2500 rpm and misfires. The head and head gasket were replaced on this car. Ford denied my buy back because I have only taken it back three times for the same issue and it has t been 30 days yet... well looks like 30 days will be up in a week and I doubt they will have a fix for it by then. The techs at the dealer and at Ford are at a loss and don’t know what is going on. I guess it’s a waiting game now. I hope I can either locate another new 17 or an 18 somewhere. If you have any leads on an 18 please let me know!