5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Fuel Pressure

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Old 09-25-2006, 11:11 AM
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5speed GT
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Default Fuel Pressure

From what I have read in the past, fuel pressure should be set around 38psi. Arent you suposed to pull the vaccume line to the regulator off to check it? With the line on its 37, and with it off its 44. I just wanted to make sure before I buy an adjustable FPR
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Old 09-25-2006, 03:42 PM
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Old 11-13-2006, 12:46 AM
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Default RE: Fuel Pressure

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Old 11-13-2006, 12:54 AM
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PRO50SC
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Default RE: Fuel Pressure

From the other thread you should have read
bottom of the page
ORIGINAL: nitrous_bob

should be about 34 at idle w/ vac on

as soon as you give gas, it will start to rise to about 38-40 and wot or the vac line off it will go to 42 psi

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