Hi from time to time my 1.1 saxo will start idleing strange, revs dipping, and also when approaching a round about for example dropping gears as slowing down say from 4th too 3rd as the revs are dropping sometimes the accelerator pedal will go down on its own and the car will pick up for a second or 2 without even touching the pedal, can anyone direct me to where the problem is and how to solve it? Thankyou 