Runs rough under a load

2000 Toyota Camry, 2.2L, 120,000miles, Auto trans.
Car idles fine until you put a load on it the it begins to skip and want to shut off.
if at a stop and accelerate hard the car begins to stutter.
no check engine light as of now my father took it to a shop and they replaced a coil pack, plugs and wires.
still is doing the same thing.
I replaced the fuel filter checked the egr valve. Took it all the way of made sure it wasnt blocked
could this be a tps sensor?