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Old Mar 8, 2008 | 01:53 PM
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From: York
Fuel PSI?
Anyone know correct psi on 99 5.4 F250?
 
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Old Mar 13, 2008 | 04:42 AM
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Around 32psi at an idle and 40-45 with no vacuum to the regulator I believe.
 
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Old Mar 13, 2008 | 07:57 AM
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Originally Posted by F-SUPER DUTY
Anyone know correct psi on 99 5.4 F250?
Book says between 30 and 45 psi at idle. Doesn't pin it down more precisely.

Disconnect the vacuum line at the regulator and you should see the pressure spike up to around 55-64.

Steve
 
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Old Mar 15, 2008 | 07:29 AM
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my 5.4 idles @ 40.
 
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