1999 Ford F250 fuel pressure

1999 FORD F-250
190,000 MILES • V8 • 4WD • AUTOMATIC
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BEAR65
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99 f250 4x4 super duty Fuel pressure cold only at about 32 psi dropping to about 28 psi running. Have cleaned injectors,replaced fp regulator,replaced fuel filter....could sensors be bad without a code.. any ideas....what should my pressure optimally be ....help
Feb 6, 2010 at 11:12 AM
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RASMATAZ
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Hi bear65, Welcome to 2carpros and TY for the donation what should my pressure optimally be-See below


https://www.2carpros.com/forum/automotive_pictures/12900_f250_1.jpg

Feb 6, 2010 at 2:04 PM
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BEAR65
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any ideas what might be causing the low pressure other than what I have tried
Feb 6, 2010 at 3:05 PM
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RASMATAZ
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Could be low voltage to the pump, intank pick-up sock or the fuel pump itself is weak
Feb 6, 2010 at 3:18 PM
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BEAR65
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is there a specific test to check if fuel pump is weak
and how much voltage should there be at the pump
Feb 6, 2010 at 4:57 PM
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RASMATAZ
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If it doesn't meet the specs above by using a fuel pressure gauge. Also check if you have a low pressure pump in the tank and also an external one-The voltage should be 10volts and higher
Feb 6, 2010 at 7:28 PM