Originally Posted by 60wag
Maybe the "bad gas" frequency will go up with Ethanol settling to the bottom of storage tanks?
The vapor pressure values I got the from the Tennessee report that Marco linked above.
Doesn't the 60 fuel pump recirc back to the tank when the carb bowl valve shuts off?
No, on a 60 it recirculates back to the inlet of the pump. My 1976 CA-spec FJ40 recirculates all the way back to the tank, which is more plumbing but keeps the fuel cooler. My 1971 FJ40 and my 1978 non-USA FJ45 do not have any returns, they just stop when the needle valve closes.