dark stranger

hi mate i see in one of the forums you offered to tune a blokes hyper 7 for him , could you tell me how i tune my .28 hyper 7 back to standard, when my car is held on a low throttle its fine but as soon as you plant the accelerater down it dies....help , i did notice a big bit of plastic in the feul tank so think that may be letting air in but i could could tune it back to standard i could go f...