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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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    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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    fuel pressure should be around 43psi
     
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  3. G-S-T

    G-S-T Probationary Member

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    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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    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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