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SportTrac Discussion
Engine & Drivetrain
FUEL PUMP QUESTION, TRUE OR FALSE
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<blockquote data-quote="Kevin Palmer" data-source="post: 618849" data-attributes="member: 54263"><p>Well.... sort of.</p><p></p><p>The fuel in the tank acts as the coolant for the fuel pump itself.</p><p></p><p></p><p></p><p>When the fuel passes thru the fuel rail it picks up a good amount of heat that is being radiated from the over all engine. To see how much it actually heats up, feel the tank with your hand before you leave for a decent drive. Then feel it once you get to where your going. The lower the fuel level the more heat that is retained. So now you are cooling the internal workings of the fuel pump with warm to hot gas. This causes the pump to exand, just like your fingers do when you get hot. It is in this expanded condition that the pump loses some of its performance due to the increase of the tolerances.</p><p></p><p></p><p></p><p>That said, with the desgn of the pumps as we know them today they are pretty tuff. I drive until my light comes on in many cases.</p><p></p><p></p><p></p><p>Clear as mudd???</p></blockquote><p></p>
[QUOTE="Kevin Palmer, post: 618849, member: 54263"] Well.... sort of. The fuel in the tank acts as the coolant for the fuel pump itself. When the fuel passes thru the fuel rail it picks up a good amount of heat that is being radiated from the over all engine. To see how much it actually heats up, feel the tank with your hand before you leave for a decent drive. Then feel it once you get to where your going. The lower the fuel level the more heat that is retained. So now you are cooling the internal workings of the fuel pump with warm to hot gas. This causes the pump to exand, just like your fingers do when you get hot. It is in this expanded condition that the pump loses some of its performance due to the increase of the tolerances. That said, with the desgn of the pumps as we know them today they are pretty tuff. I drive until my light comes on in many cases. Clear as mudd??? [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
FUEL PUMP QUESTION, TRUE OR FALSE
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