RatherSideways

my car has starting acting up on me lately. under part throttle, tc locked, between 1600-2000 rpm in top gear the car bucks and jerks. after 2k rpm it seems to clear up. it doesn't always happen- just sometimes. also, at idle the car will cut out for an instant. the car always catches itself and continues to idle, but it's just like hitting a kill switch for an instant. as with the part throttle problem, it doesn't happen all the time. no check engine light, no nothing. i'm flummoxed. can anyone here give me a bit of insight?

thanks in advance.