Hi Vincent

Not necessarily. As long as there is a remotely operated fuel shut-off, then the installation is legal. It does NOT have to be controlled by the ecu. So a valve operated by a servo would fit the AMA criteria. Technically, shutting off the fuel pump would essentailly do the same thing, but being as we use gear pumps, there is still the potential to syphon fuel through the pump.

A fuel pump with a check valve will not positively stop the fuel flow as it would have to operate as a check in the direction the fuel normally flows.

Sincerely,
Ed