noob! help :) hyper 7

[jhowlett]

i just purchased a hyper 7 second hand, ive been driving electric for years and decide to buy a nitro car. I really dont know much about them, ie tuning the engine, i would appreciate any help!
do you run it leaner or richer in the cold weather?
also i leave it to warm up for 5 mins then when i apply about half throttle the car cuts out, any ideas why?

i would really appreciate any help/advice
thanks in advance!!!