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if you have just under 100k on your prius i would look at the condition of the spark plugs on that vehicle. they do have a normal hesitation from a take of at times that is the electric engine starting the gas engine for a more powerful take off. but i am assuming this is not the jerk you are talking about. i would recommend a full service on it. they do have a tendancy to get a bit gummed up in the intake since they are a hybrid.
if you dont have anymore questions i would appreciate a positive rating.
well it could be the fluid in the transmission as well sometimes these cvt transmissions need to be reset with new fluid in order to adapt to new fluid. also if the throttle body gets a glitch it will cause this. have you had all the ecu flash updates done on this vehicle? those are a few things you can look at aswell. but a slight stumble and recovery at that mileage tends to be plugs but you say you had them done at your last check up. but i would double check and ensure they were in fact replaced.