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Fuel pressure

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Old 11-11-2015, 10:35 AM
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Fuel pressure
On a 89 f-150 with 5.0 L efi ,what is the fuel pressure on the fuel rail supposed to read, PSI ?
 
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Old 11-11-2015, 03:06 PM
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Somewhere around 30-35psi at idle with vacuum attached to the pressure regulator and 39-45psi with vacuum disconnected from the regulator.
 
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