One to think about
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Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
Inertia switch would shut down the fuel pump completely (it runs quite well after bleeding out the air)
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Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
does the cooler have a schraeder value on it? is it possible that due to the reduction in temps (sitting) there is a small vacuum created and the schraeder valve is sucked enough to allow air ingestion.. and with the drives side down (how steep an angle is required?, 1 2x4 on the passenger side, or 10inches for example?).. the air is enough to bubble uphill from the cooler..
I thought it had a schraeder valve I used when I changed my fuel filter and it wouldn't start...
Sam
I thought it had a schraeder valve I used when I changed my fuel filter and it wouldn't start...
Sam
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
I don't believe that there is air IN the fuel itself, so there must be some other entrance mechanism... unless there is a bad gasket on some part,
which I think you have ruled out, then there must be some other 'easy' way for the air to get in.
if the truck is tilted the other way the air is expelled and doesn't cause this airlock problem.
the only 'easy' way is the schraeder valve..
I have seen them sucked open in other environments.
Sam
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Postmaster
Joined: Feb 2006
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Likes: 4
From: waynesville, mo.
Running, you always have pressure on the schraeder valve (albeit small, 3-5 psi). Driver side down, the valve is on the "down" side of the cooler. The high side (return line) is on the "up" side. The air would collect there.
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
If I was the tech, the man would probably be getting to lemon law the truck. Have you fixed this problem and are just quizzing us, or does it have you stumped to? I am leaning toward you quizzing us. FTE's last hope is cheezit. Someone go grab him in the 6.0L forum.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
IF there was a small reduction is size, it would cause a vacuum pressure, sucking the schraeder valve open from the inside, letting air in.
when the drivers side is down, the path for colder air to the cooler is shorter, so maybe it cools faster than expected, pulling the valve open..
Sam
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Postmaster
Joined: Feb 2006
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From: waynesville, mo.
I have an idea, but I can't verify until I can get it back together. Its frighteningly easy for a "do it yourselfer" to make a bad mistake and have this issue staring him in the face. Hopefully I'll know tomorrow.
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From: Frederick, MD
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