I have been practicing some single engine landings like a lot of people are doing now :) and im having a big rudder prob. when the engine shutsdown i start to apply rudder to compensate and will use like 40% rudder or so and all a sudden the rudder goes to the full position it happens if i give left or right rudder. whats the prob here? yaw damper and auto cord off,rudder effectness 4 and fsuipc 2.87.http://events8.tripod.com/pilot_tag.JPG

Check the Rudder Spike Fix in the technical section of fsuipc 2.87.