Hi Guys

Last night while driving the ST170 home from work, when I accelerated away from the lights the throttle pedal stuck down on full throttle, it then released and seemed fine again. At the next roundabout I floored it and it stuck again !
Driving it gently throttle is fine, when I got home I gave it a couple of revs and the peddle stayed down on full revs, then released.
When the car was cold later in the evening took it for a run and all seemed fine, cant get it to stick.
I took the cable out and it seems fine.
This morning driving it to work it was fine untill the engine got hot and then started to stick again.
Should I replace the cable ?