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

vents plugged

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Old Apr 16, 2008 | 08:41 PM
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vents plugged

I took my bed off today and seen that my vents for my diesel tanks are plugged with bolts. Are they suppose to be plugged or open?

I also unhooked my fuel gauge wire and got a jumper wire and jumped them over and the gauge went up. That means it is in my sending unit correct?
 
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Old Apr 16, 2008 | 08:49 PM
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If you grounded your wires directly and your gage works, then yes your sending unit is bad.

What sending units do is vary the amount of ground just like a variable resister (potentiometer).
 
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Old Apr 17, 2008 | 01:43 PM
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Here is what I was referring to as to the vents plugged. Thanks
 
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Old Apr 17, 2008 | 01:51 PM
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That looks more like a vent cap to me, kinda like a mushroom
 
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Old Apr 17, 2008 | 02:06 PM
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Originally Posted by Archion
That looks more like a vent cap to me, kinda like a mushroom
No im positive its not, the end is completely blocked off.
 
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Old Apr 17, 2008 | 02:06 PM
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Originally Posted by Archion
That looks more like a vent cap to me, kinda like a mushroom
Yeah, I would leave that alone.
 
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Old Apr 17, 2008 | 02:22 PM
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ok will do, even the back tank since its got a bolt in it?
 
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Old Apr 17, 2008 | 02:58 PM
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Originally Posted by rmalottwtes30
ok will do, even the back tank since its got a bolt in it?
If it's actually got a bolt in it, then no. you need to get another vent cap, like the one that is pictured.
 
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Old Apr 17, 2008 | 04:07 PM
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What I did was switch the vent hoses. Since I don't use my front tank(Cost to much!)

Is that why it liked to splash at me when I fill it up?
 
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Old Apr 17, 2008 | 04:43 PM
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Originally Posted by rmalottwtes30
What I did was switch the vent hoses. Since I don't use my front tank(Cost to much!) Is that why it liked to splash at me when I fill it up?
It's a possibility.

Also if I were you, I would fill both tanks, and run off of each tank in turn.

What I do is I run off my front tank to half a tank, then run the rear tank to half a tank and then fill it up.

This will keep the tanks from rusting, and collecting water, and you still are only using one tanks worth of fuel at a time. And in an emergency you have the fuel if you need it.
 
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