Question about 2000 Chevrolet 3500

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Fuel whins and but engine stars up but it will sometimes stop

Fuel pump starting whining about a month ago, no it runs but i'll stall out sometimes. seems like it runs when it wants. also whats the fuel pressure supposed to be?

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It is going out ,real soon when they start the whinning noise, good luck hope this helped you, thanks robert b.

Posted on Jun 30, 2009

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Whinning noise when engine is off


Whinning Causes
The whining noise you hear coming from the power steering pump is one of three things. The first is more of a loud "hush" than a whine; this is the sound of fluid rushing through the bypass valve when you turn the wheel all the way to one side or the other. Sometimes the bypass valve malfunctions or doesn't open all the way, causing pressure to back up in the pump and cause your engine rpm to drop. The second and third causes result from cavitation -- vacuum pockets created behind the rotor's vane blades as a result of extremely high pump action -- or air in the lines.

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