throttle getting stuck after releasing trigger on remote

[Tcal626]

So i recently installed a new motor and went through the break in with no issues. Noticed when driving my Losi LST truck my throttle will randomly getting stuck. Not sure if it could be the Servo no responding or maybe my transmitter. Everything is original on the Truck Gen 1. Also i do have the return spring on the throttle.
Thank you for your help.

 

[offroadrcguy]

remove the carburator and check if it is sliding smoothly. if thats not the problem then check if the servo is bad

 

[cbaker65]

So i recently installed a new motor and went through the break in with no issues. Noticed when driving my Losi LST truck my throttle will randomly getting stuck. Not sure if it could be the Servo no responding or maybe my transmitter. Everything is original on the Truck Gen 1. Also i do have the return spring on the throttle.
Thank you for your help.

Probably a weak servo ,if it is old!