Assuming you're already pretty strong cut back on weightlifting and replace it with some cardio. Also your my height and age so eat less. Try around 2000 calories. and also eat healthy. Nutrition is the most important part of losing and gaining weight! Full rest sprints are also really good for weightloss and for becoming faster. 1 more thing, have you ever heard of sixpackshortcuts on YouTube? My friend is doing it and he says he's losing weight. I've checked it out because I'm trying to get bigger so I hope to see some results in a week or two. but yeah just check them out. http://www.youtube.com/user/sixpackshortcuts?feature=results_main

Hope it helps!