My old-aged Wira 1.6(A) has this problem recently. When I started my car, it's okay. When I put the transmission to R(reverse) it still can move. Problems start when I change it to D, 2 or L, where it does not move no matter how hard I press the gas pedal. It only move a tiny bit before it kinda 'cough'. Does this have something to do with my gearbox?