I've noticed problems with my recently bought mk4 Astra 1.6 8v car. When changing gear, the car jumps moderately while changing. Basically its not a smooth ride while changing gear when compared with the the new Astra that I was doing my driving lessons in. Is this normal in this version of Astra or is it an indication of a problem? The car also seems to want to shut itself off at idle if not given more than normal gas when moving off. I also noticed that the car struggles to go up steep slopes. I tried it recently and the car stalled as I was trying to go up the slope. Does anyoneknow what is or could be wrong?