Hi Ali, if you push the back of the car down and let go, it should come up and stop, if it bounces up & down then shocks might need changing, go to good scrappy, and get shocks & springs together, because if you do not have a set of spring compressors then it can be dangerous to attempt to remove springs. a lot easier to change the whole leg. Good Luck, and I cannot wait to see what you post next as you must love your corsa, to do so much work on it, most people would have said f**k it and scrapped it and bought another car.
hope it helps
October 2010