accelerator pedal too light.

[foge]

I HAVE JUST BOUGHT A 2.2 RT LAGUNA.
I tested the car previous to the mot and the accelerator was sticking so the seller put a new cable in. However after driving it for a week the throttle is uncomfortably light.
My wife has a 1.8 laguna and thats perfect.

I have stared at the accelerator cable but can't work out if there is a way to adjust the tension i.e. I want it alot stiffer, I want the accelorator to support the weight of my foot as its giving me cramp holding my foot up!

Is there ANY way ( and I mean ANY way) to make it heavy again? like when its a bit worn?? Its driving me totally nuts that its now so light, every time I am in heavy traffic it becomes unbearable.

any ideas appreciated
geoff