1999 Ford F-250 fuel pressure

BEAR65

MEMBER
1999 FORD F-250
V8
4WD
AUTOMATIC
190,000 MILES

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

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RASMATAZ

MECHANIC
75,992 POSTS

Hi bear65, Welcome to 2carpros and TY for the donation

what should my pressure optimally be-See below

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Saturday, February 6th, 2010 AT 2:04 PM

BEAR65

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Any ideas what might be causing the low pressure other than what I have tried

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Saturday, February 6th, 2010 AT 3:05 PM

RASMATAZ

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Could be low voltage to the pump, intank pick-up sock or the fuel pump itself is weak

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Saturday, February 6th, 2010 AT 3:18 PM

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

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Saturday, February 6th, 2010 AT 4:57 PM

RASMATAZ

MECHANIC
75,992 POSTS

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