Thanks for the last 3 replies, but I doubt the servo or interference problem. The reason I say that is when I had it on the stand and running after the episode it the air I was looking at the throttle linkage movement and with the engine running the throttle and servo were moving as they should but it did not make any difference in reducing the speed unless I moved it very fast. I have a 2.4 set and a nyrod is used from the servo to the throttle linkage with no metal.