Fuel pump running all the time

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Apr 7, 2010 | 05:11 PM

TJISFAT

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Joined: Apr 2010

Posts: 2

Fuel pump running all the time

i just bought my 2000 blazer and i just have notice that the fuel pump comes on and stays on until i shut off the truck. i know that its on before u start and when u shut it off. any help please.

Apr 8, 2010 | 10:06 PM

danmiranda

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Joined: Jan 2008

Posts: 165

From: South Jersey, USA

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Do you mean it tends to be noisey? Like a large whine? Its defiantely supposed to stay on the truck, otherwise your in for a few "Oh Sh*t" moments...

Apr 9, 2010 | 02:17 PM

TJISFAT

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Joined: Apr 2010

Posts: 2

its like the fuel pump is running at all times. i know its got to prime, but does it have to continuslly run while i am driving. the other cars i drive i dont hear the pump on while drving.

Apr 9, 2010 | 03:07 PM

RonJon

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Joined: Apr 2006

Posts: 467

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The pump runs 3 seconds when you turn it on, 3 seconds when you turn it off, and constantly while it's running (sensing crank motion). Did you ever try changing the fuel filter? That might make it quieter.