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Old 06-19-2011, 07:11 AM
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in the old daze when transmissions had vacuum lines on new cars... you often would notice a u shaped loop that went 'up' near the hook up to the vacuum source at the manifold.

That loop 'up' , then down towards the trans , prevented fuel from traveling down the vacuum line tube. Any fuel would drain out of the vacuum tube because of that loop
Dont worry how old you are... it is the mileage on your body that adds up.
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