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Old 10-13-2018, 06:31 PM   #1
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Silly question - fuel line under pressure when battery is disconnected

Stupid question alert! I had the intake manifold off to hook up heater core hoses, and was surprised to find that the fuel feed line had quite a bit of pressure built up, and would keep pushing fuel out until I clamped the line. Is this normal? I thought with the car off & battery disconnected there would be no pressure.

Car is an 89 with OBD1 S52.

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Old 10-13-2018, 06:51 PM   #2
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Yes. There is a check valve in the pump to ensure there is pressure in the line so that starting is easy.
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Old 10-13-2018, 07:17 PM   #3
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10-4, thanks!
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