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  #31  
Old 07-26-2013, 06:49 PM
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Did you guys catch the bit in the PDF regarding the fuel separation in the tank and in the tanks at the filling stations? The ethanol sludge settles out at the bottom, so if the tank sits, you could be pumping nearly pure ethanol sludge into your tank. the tank I had put in when it boiled out of my filler was from a suspect station. I had noticed I couldn't hit normal speeds on that tank. I just filled up with gas from my regular station and it hasn't overflowed and I suddenly can hit normal speeds on the hills again.
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  #32  
Old 07-26-2013, 08:48 PM
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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?
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  #33  
Old 07-27-2013, 03:26 PM
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Quote:
Originally Posted by 60wag View Post
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.
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  #34  
Old 07-27-2013, 06:07 PM
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Weird, my 60 recirculated back to the tank. In fact I use that same return line today still with the injected setup.
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  #35  
Old 07-27-2013, 09:35 PM
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Both of my 60s had a single fuel line between the pump and the carb while they had two lines between the tank and the pump. I always thought one was a supply line for the pump and the other was the return to the tank.
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  #36  
Old 07-28-2013, 05:41 PM
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FJ60s have three ports on the fuel pump: inlet, outlet and return:
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  #37  
Old 07-29-2013, 05:34 AM
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Quote:
Originally Posted by 60wag View Post
The charcoal canister has a couple of check valves on it. The fuel vapor has to build enough pressure to push a check valve open before it can flow into the charcoal. The pressure required to open the valve is supposed to be pretty low but it exceeds what you can produce by blowing on it with your mouth. I think the valves get sticky over time and the cracking pressure can go up.
I would check the FSM for a test procedure for those valves. My 40 manual just says you should be able to blow air into the tank port, as well as the purge port. Then it says you can clean the charcoal by capping off both of those and blowing air into the port that vents the carb float chamber into the can at 40 psi.
There are no pressure specs for testing the check valves.
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