Make sure you use regulator on receiver pack.
Plug receiver pack into regulator, regulator into BEC in receiver.
Leave ESC switch off and use only receiver pack switch to turn your car on.
Turn off lipo cut off. In mod 1 cell don't have as much punch as 4 cell so light weight should help. Make your car weight down to 750g if you can but Left-Right balance is more important than light weight I think.