Cole Foree

I have a 98 K1500 5.7. Recently started having extended and hard starts mainly after sitting awhile and during cold weather but after running a short while and while the engine still warm it would start no problem. Checking online I find that the 5.7 should 60psi with key on engine off and 60-66 with engine idling. I was getting 60 key on engine off and right about 51-52 with engine idling. So I went ahead and replaced the fuel pump and after replacing I checked the pressure again and sure enough 60key on engine off and right around 51-52 with engine idling. Now though the truck starts instantly everytime with no drama. I think silver sled is right about the check valve. In that case you may be reading the right pressure but is still the fuel pump causing hard and extended starts. Im not sure where the 60-66 psi spec comes from but even videos Ive seen of people checking fuel pressure on these trucks they get about the same as I did. Unless there is some other problem with my truck and others that I don’t know about. Either way it runs great now.