1. Onboard battery pack is not properly charged
    Charge battery completely, or replace onboard alkaline AA batteries (nitro models).
  2. Loose or damaged wiring
    Poor wiring can cause high resistance and poor power transmission to the electronics. Inspect the wiring to find any issues.
  3. Worn Servos
    If the servos are well used, they may just be worn out. Replace them to return to proper performance levels.