Hesitates when accelerating

When I'm driving at 55 on main road when approaching a hill, I give it gas but nothing happens if as no torque converter resulting in me pressing the be throttle until the passing gear kicks in. I also noticed today while driving down the interstate going somewhere around 65 to 70 plus when I give it throttle it appears that the torque converter is locking up but it doesn't seem like it stays locked up you can feel the throttle response, but if you give it too much throttle nothing you almost have to barely give it any gas if that makes sense what seems to be my issue. I've replaced the crank position sensor the cam position sensor and throttle position sensor as well as the MAP sensor.