I have a 1994 Chevy 1500 Stepside with a 350 engine. I have been having fuel problems. I have replaced the fuel pump twice and it will run for a while and then it will act like it's not getting fuel. It will idol, but when I try to accellerate, it will sput and spitter and die. I'm beginning to think it might be a computer problem, but my check engine soon light does not come on. What is your opinion of this?