have you tried taking it apart and checking the lil curclip hasnt fallen off and got lodged down the side of the cog? I'm not sure about the mr2 regulators but i know the toyota hi-lux window motors are the same as i have one on mine!
yeah ive had it apart been playing up for months but it finally stoped working alltogether yesterday got a block of wood holding the window up! lol with the hilux any particular year?
hmmm not too sure which fit but mine was from a 1996 hi-lux surf, haha, block of wood haha, thats how i use to roll =D