So, at the last track event (barber, Chin, April 7,8) some bad things happened. ECT was low. Even on the track ECT was below normal operating temp for portions of many laps. Off the the track check engine light and low temperature codes appears. Ford replaced the thermostat - this is the third replacement. They say it was jammed up in the wide open position. So far they have no theory as to why this keeps happening. During portions of many laps (sometimes coinciding with low temp) the car felt like it went into a kind of limp mode. Later in each lap it would be back to normal. Car threw a number of P0xxx codes (general and several specific misfire codes) Dealer has changed coil packs, performed neutral profile relearn, removed intake, etc) and everything looks good. During test drives the car starts missing at over about 4,500 RPM. Right now they are mystified. Y'all have any ideas of what can be going on here??? Thanks.