I have a 2009 f150 with 139,000 miles it was running perfect all day then I went to pass some one then lost all power engine went into limp mode and won't reset after disconnecting battery. Left battery disconnected for the entire day. Mods I have done are K&N Intake, throttle body spacer and glass pack. Anyone have any advice? Haven't ran codes yet.

 

as long as there is a code causing it to be in limp mode, it will not reset until the problem is repaired.