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Lift pumps have a check valve?

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Old Mar 4, 2011 | 12:29 AM
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gozapper
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Lift pumps have a check valve?
Do the lift pumps have a check valve so that the fuel dosen't drain back?

Should there always be some pressure showing when we shut down?

Thanks,,
Tom
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Old Mar 4, 2011 | 10:35 AM
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infidel
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From: Montana
There are three check valves in the pump but they don't prevent the pressure from dropping when the engine is off.
Normal for the pressure to drop to zero in about ten seconds.

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