Quote Originally Posted by pl4yboy View Post
Actually, shutting the pump off should result in a loss of fuel pressure over an extended period of time... not instantly by any means. My truck will still be holding 50+ psi after 5 minutes of the truck being off.
This is with the truck not running. His pump shuts off while the truck is running so the injectors will keep pulsing causing pressure to drop in the rail until there is not enough pressure to supply fuel. It sounds like an issue with either the PCM or VATS to me.