wont run rt

[top shelf racing]

hi supervee 27 hear ecm chrip 1 then 3 times prop runs good untill put in water than lunged forward and stops.may let you rearm or may not is sporadtic.made 1 good run then acted upp again.at times no beeps from mtr.other times arms ok first 1 beep then 3 then lunes about 2 inches stops.rudder works ok all the time.ocasionally can hear and seee servo glitch .once mtr kept going while noone was touching remote had to stop by turning remote off.tried 3 sets of 3000and 1 set of 4200nicds.no differnce.thanks in advance foe the help.ernie