cold start problem?

when i try to start my ford escort td in the morning it takes ages. changed glo pugs oil/air filter and checked battery and earth leads which are all fine but i noticed the cold start cable was meant to be set between 1 and 2mm from stop so i altered it by the cable which i now think i may have done wrong and should of adjusted with screw on the side. now it wont start at all but when i do get it started it will start every time no probs with no smoke or rattling.can you please help