one owner professionaly serviced- now its come to me

ok when it warms up she stalls, starts sometimes and goes...
I drove it for 20 minutes, it stalled, ran for another couple miles,
stalled, started and stalled after a block, parked it.
It goes, runs for seconds, as soon as i hit the pedal the rpms jump and it
stalls...
I can hear the fuel pump going when i turn the ignition, it has a
distributor and rotor not a coil pack.
The lady said, it stalls sometimes. Told me that she had to get it towed a
couple times. She changed afew sensors under the hood, but didnt touch the
O2 sensor on the exhaust.I imagine her mechanic could not find the problem
for whatever reason, or perhaps she was tired of getting nickled and dimed
to death.