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Clarification on fuel pressure

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  • Clarification on fuel pressure

    350 chevy, right between stock and mild cam.
    It seems to run rich by the obnoxious fumes out the exhaust at idle.

    I'm using the 5009 map. The Edelbrock remote sump is set at 58 psi from the factory. With the vacuum reference hose hooked up the psi is 43 at idle. Does this sound correct or is it just coincidence it's 43 psi? The 5008 map is a 43 psi map. Does that infer it will be lower than that at idle?

  • #2
    If you have the vacuum reference line hooked up then lower fuel pressure at idle is normal.

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    • #3
      Originally posted by Heatsoaked View Post
      350 chevy, right between stock and mild cam.
      It seems to run rich by the obnoxious fumes out the exhaust at idle.

      I'm using the 5009 map. The Edelbrock remote sump is set at 58 psi from the factory. With the vacuum reference hose hooked up the psi is 43 at idle. Does this sound correct or is it just coincidence it's 43 psi? The 5008 map is a 43 psi map. Does that infer it will be lower than that at idle?
      What are the AFR's at idle?

      MAP 5009 requires 58 psi , checked with vac line unplugged.
      Don't get too caught up in the numbers.
      Just give the Engine what it wants &
      Let the numbers be what they are.

      Jim McFarland....

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