as previously said your cooling system needs looking at.i think its probably your wax stat thats given up the ghost.you can do three thing if it has 1: buy a new wax stat from Toyota
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(mega bucks) 2: take off the air intake look down the throttle body and fine a small hole on the right,block this with a tyre cap.this will stop the bouncing idle.you will have to adjust the tick over.the snag here is that the car will not tick over from cold or if you adjust for that will race when hot.
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3:the most sensible option contact Paul Woods and buy a choke conversion kit.
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About
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£50 easy to fit and problem solved.you get the added bonus of improved economy as the choke can be switched off after a quater mile,not the two or three as normal.Check the archived posts as there will be hundreds on this problem.
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