One problem related to other fuel system hoses lines/piping, and fittings has been reported for the 1999 Toyota Land Cruiser. The most recently reported issues are listed below.
My fuel cap vented gasoline, violently. Fuel ran down my body panels below the gas cap as vapor/liquid spewed out of the car. It seems the fuel system was over pressurized. I was at chinn's lake in colorado. Elevation is roughly 11,000 feet. Temp was around 70f. Gas tank was around half full with premium gas from costco. From what I have read, it appears the gasoline began to boil and needed to vent. This can be from a faulty evap system, an overheated fuel system, ethanol in the gasoline, etc. . .