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Default Easy Permanent Fuel Pressure Gage
by Comanche91 01-20-2013, 08:39 PM



Here's a simple little mod that saves you time by enabling you to check your fuel pressure any time you want. The parts:
1.) A 0-60 PSI liquid-filled 1-1/2" fuel pressure gauge from Jegs, p/n 555-41012
2.) A brass 1/4" flare x 1/8" female NPT straight adapter fitting from here: http://www.casperselectronics.com/st...oducts_id=1337

Use teflon tape on the gauge pipe threads then snug it on the adapter:


After the engine has been sitting overnight and is cold, bleed any fuel rail pressure off first by depressing the Schrader valve needle. Have a rag handy in case the fuel squirts out. Then remove the core needle from the fuel rail Schrader valve w. an extractor tool, same tool used for bicycle tires.


My ever-present red-eyed helper:


Screw the assembled gauge and adapter on the Schrader valve. Since it's a flare, do not use teflon tape, and do not over-tighten:


Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
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  #16  
Old 05-18-2013
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Default Re: Easy Permanent Fuel Pressure Gage

: Is 37 P.S.I. the right pressure? Going to try this and see what the book says.
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  #17  
Old 07-15-2013
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Default Re: Easy Permanent Fuel Pressure Gage

Cool. Interested to see the longevity of the valve in under-hood conditions.
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Old 07-21-2013
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Default Re: Easy Permanent Fuel Pressure Gage

Quote:
Originally Posted by lewdwagon844 View Post
: Is 37 P.S.I. the right pressure? Going to try this and see what the book says.
I believe it's 49 psi for the 97+ fuel systems.
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Old 06-10-2014
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Default Re: Easy Permanent Fuel Pressure Gage

nice will have to do this myself thanks!
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  #20  
Old 11-18-2014
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Default Re: Easy Permanent Fuel Pressure Gage

Great idea!
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  #21  
Old 02-19-2016
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Default Re: Easy Permanent Fuel Pressure Gage

Any updates regarding longevity?
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