Question for Gee Car Care Services

Am having a problem with a Toyota 4 runner v6 4L, the issue is that the car starts alright but when the engen runs for some period of time and you swicth the engine off about 30 minutes if will crank alright but will never start untill u wait for some hour before you start,I've changes all the two cam sensors and also the fuel pump yet still,so I need your help.