I have had this problem where my car just whirl's over and will not start. I basically have to prime my car using my key switch to get it to start sometimes. It doesn't do it all the time but it is very annoying when it does do it. So is it either the relay/pump or something else? I don't know if this will help but my fuel pressure gauge fluctuates alot when it runs basically around 30psi-38psi most of the time.