7.3 Fuel Bowl Vacuum Switch - Ford Powerstroke Diesel Forum
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Old 02-03-2014, 09:58 AM
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7.3 Fuel Bowl Vacuum Switch

Hello all, I'm having some trouble locating a fuel leak. Fuel is pooling in the valley and dripping on the ground near the back of the engine. I have resealed the drain valve and replaced the fuel filter and cap with a new motorcraft unit, yet the problem persists. I feel there is a potential that the vacuum switch on the bowl may be leaking, and I'm looking to remove and plug it. Where is the sensor located on a 2001? I can't seem to find it.

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Old 02-03-2014, 10:41 AM
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Vacuum Switch? What's That?
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7.3 Fuel Bowl Vacuum Switch-fuelbowl.jpg  
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Old 02-03-2014, 10:50 AM
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Also called a fuel restriction switch I believe? I know OBS trucks have em and the sensor itself is prone to leakage through the sensor. Do super duties even have them?

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Old 02-03-2014, 11:55 AM
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I don't think so....
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Old 02-03-2014, 08:27 PM
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Nope. Only electrical hookup on the fuel bowl is the fuel heater.
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Old 02-04-2014, 06:33 AM
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Could be the fuel line O-rings. Four of them on the bowl.

2- 1/4"
1- 5/16" return line
1-3/8" supply line

They go bad easily and typically are not reusable. If you get the Viton or military grade Viton, those can be possibly reused.

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