Originally Posted by kerry

No, I haven't but there was a post on here a couple of years ago that definitely proved that if you disconnect the fuel line, the engine shuts down promptly and doesn't use up the fuel remaining in the filter/IP etc. It was in regards to the options available when the engine runs away after a faulty shut off valve install. That's why I suspect that that the IP won't pump fuel if there's no fuel arriving at the inlet because the lift pump isn't pumping fuel to the IP.

It would probably allow air to get sucked in which would need to be cleared out with the primer pump.