Got a problem with my saxo, When you put your foot down on the accelerator the car pull's very sluggish, and finally picks up after a while. I have recently renewed the headgasket and had the head skimmed, as before it had a over heating problem, I had previously before renewing the head gasket also replaced the lambda sensor, coolant temp sensor and crankcase sensor but these didn't make any difference so I went for the complete strip down and replaced the gasket, which despite the current fault sorted the initial running problem out. The car runs perfectly in idle and when you dip the throttle in neutral there is no hesitation or misfire, only once you've put it into drive (put load on the engine) and try to pull away does the fault become aparent. It has a multi point injection system of which I have removed all the injectors and fuel rail and cleaned them all, but i'm sure if these were the problem it wouldn't run ok in idle, I have also removed the throttle body and all the accompanying sensors, and cleaned them but still to no luck. I'm lead to believe in thinking it could possibly be the Throttle potentiometer, as these can wear out??? Any thoughts from anyone would be a help...O and also I have had the ecu checked out and plugged into a gizmo, but no fault codes were shown.