Stalling

I'll try that and let you know what happens. Is there another vent for the tank? Thanks
don't know for positive, but I think so. If it's a CA car, nearly certain. Unless the car is super original, you might be dealing with a mash-up of parts. You know vented vs non-vented cap, stock vs replacement tank, etc. Maybe a vent line or fuel supply line got crushed when the trunk floor was replaced.