2002 Toyota Corolla hard gas pedal and poor accleration

Hey 2carpros;

My question how do I know if a throttle cable is bad; my gas pedal is hard to depress; sometimes have to keep foot to floor or criuse contol on to relax foot.
Is tps sensor related to this problem?
Also I notice a slight hesition when eng is cold. I replaced the electric fuel pump; fuel filter; and sock but still no change. Could the new pump be incorrect? The eng compress is good at 200 psi and fuel pressure with in range.
A chek eng light came on for infecient cat which Meineke replaced' I'd appreciate your imput. Rob