That air line connection from the fix a flat can was attached to the Schrader valve on the lower section below the vapor tank. It’s the fuel pressure the injectors use.
Ok you got to finish these troubleshooting cases! 1987 Laser 220 (Mercury220) no power. Screwed on a fix a flat air line pulled off the can and fed into a gas tank got some gas then foam then nothing. Pump shuts off religiously at 20 seconds. Pulled fuel line from filter and connected to pump, a...