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  #1  
Old November 26th, 2003, 12:23 PM
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Doug Walker
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Question Testing Fuel Pressure

Anyone know the proceedure to test fuel pressure?

Thanks,

Doug
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  #2  
Old November 26th, 2003, 02:28 PM
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J. Michael McCaig
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There is a schrader valve on the fuel rack above the injectors where you can connect your test gauge. I don't have my manual in front of me but if I remember right it should read a constant 34psi (or there abouts) and should not leak down too quickly after you shut down the engine.
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Old November 26th, 2003, 06:24 PM
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Doug Walker
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That's terrific. I'm amazed its that simple. Thanks, Michael!

Doug
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Old December 13th, 2003, 06:40 PM
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Doug Walker
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Finally got around to looking for this schrader valve. Doesn't appear to be one on my '93 3.9. Shop manual says to attach a guage to the fuel line at the fuel filter. Anyone know what kind of guage will fit?

Thanks,

DW
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Old December 14th, 2003, 02:59 AM
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Thats what I thought, when i read that i was like only the newer trucks have the valve.

I would try to get something to fit where the input joins the fuel rail.

Ron
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