I finally got a chance to buy a fuel pressure tester today. Here are the readings on my 2001 Suburban. 1. With the engine off, gauge connected to fuel line, 0 psi. 2. With engine off, ignition switch to ON, fuel pump ran for a few seconds, pressure rose from 0 to 45 psi. Then fuel pump stopped, pressure dropped to 15 psi in less than 1 minute. Then to 10 psi after 2 minutes. 3. Turn engine ON, with engine idling, fuel pressure rose to 44 psi. 4. Turned engine OFF, pressure dropped to 15 psi in less than 1 minute and 10 psi after 2 minutes. How is my fuel pump? Thanks.