First, the electric pump is about 12 inches from the gas tank.it is in the same line as the mechanical pump. I had installed it for completely different reason. It was just supposed to be used to prime the line when the truck sat for a long time. If it wasn't for having it, I would have been stranded more than once.The description for the electric pump stated in could be used by itself and it could be turned off and it allows gas to pass through. I will pull the pickup and check it but it is a new tank and lines and has never sat for any length of time that would allow gas to go bad. At this point I don't know how it could be anything but the pickup.