fuel pressure regulator psi? super afc?

Posted by G-S-T, Jul 27, 2010

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  1. G-S-T

    G-S-T Probationary Member

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    Joined Jun 28, 2010
    St. Paul, Minnesota
    anyone know what psi i need to set it at on my fuel pressure regulator? my car is a 97 eclipse gst. i also have a 1st generation super afc..i dont know what i should adjust all the knobs. help? thanks!
     

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  2. whe3ls

    whe3ls Proven Member

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    Joined Jun 23, 2008
    spokane, Washington
    fuel pressure should be around 43psi
     
  3. G-S-T

    G-S-T Probationary Member

    9
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    Joined Jun 28, 2010
    St. Paul, Minnesota
    idk y but it jumps up and down sometimes between 33-43 but it mostly stays at 33 psi
     
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  4. steve

    steve DSM Wiseman

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    Joined Feb 3, 2002
    St. Charles, Illinois
    You set the base fuel with the vacuum line off and plugged to 43.5 psi. Once you reattach the vacuum line the fuel pressure will drop about 7-8 psi, assuming you have normal engine vacuum at idle. The fuel pressure with the line attached should change 1:1 with intake manifold pressure. Dropping when there is vacuum in the manifold and rising as there is boost.
     
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