servo problems..

[bnR34]

i have 2 cars that i run outside as rally cars in the dirt. they are both evo chassis, one has never had problems but the other one.. well, i was turning right and it wouldn't go straight again. when it finally did the steering only worked occasionally and when it did it would stic one way or the other until it finally just stopped all together. i have a spre so i switched it out and its doing the same thing just not as bad,,yet. its awd stage 2 and no power switch. could it be the cars electronics or just dumb bad luck with 2 bad servos?

[Scionbeave]

that has happened to me before and it was my board. it could be the steering fets.