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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Fuel tank issues

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Old Apr 13, 2020 | 09:46 PM
  #16  
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Franklin2
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I think his truck is too old though, I don't think he has a return line system. But I was wondering if the vent lines where clogged, as the day went on and the weather warmed up, would the fuel expand and push it to the other tank through a faulty valve? Or possibly the valve can't handle the pressure and is bypassing the fuel?
 
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Old Apr 14, 2020 | 02:56 PM
  #17  
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Good catch. It being an 81 it wouldn’t have my trucks system but, I think you’re on the right track.
 
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Old Apr 15, 2020 | 06:03 AM
  #18  
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Originally Posted by Franklin2
I think his truck is too old though, I don't think he has a return line system. But I was wondering if the vent lines where clogged, as the day went on and the weather warmed up, would the fuel expand and push it to the other tank through a faulty valve? Or possibly the valve can't handle the pressure and is bypassing the fuel?
Definitly Possible. I had a vent line clog for a while and it would pressurize the crap out of the tank. Never noticed it transfereing though.
 
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