scott291racing

so heres the story. i bought this truck and it had this problem that it will start for 1 sec then just stall. And thats every time. So i am having my dad fix it.(he is a auto tech and he is having problems trying to firgure it out. This is what i have its a 99 GMC Z71 1500 reg cab. long box. Great shape. Not much rust at all. So he ran it through his computer i guess and the computer checked out fine. and the fuel pump is running when the key is turned on. What segestions do you guys have. he did some other test but i cant think of them. Just please give me any info that would help my dad get this going.lol
Thanks