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fuel pressure issue

Discussion in 'EFI Tuning Questions and Engine Management' started by racerron67, Sep 1, 2014.

  1. racerron67

    Joined:
    Feb 17, 2014
    is it normal for the fuel pressure to drop (below 38 psi) during cruiseing speeds because of vacuum acting on the regulator?
     
    racerron67, Sep 1, 2014
    #1

  2. Mnlx

    Joined:
    Sep 20, 2009
    Yes, the more vacuum your engine makes, the lower the fuel pressure will be.
     
    Mnlx, Sep 1, 2014
    #2

  3. racerron67

    Joined:
    Feb 17, 2014
    so the should i set the fuel pressure at 38 while idling?
     
    racerron67, Sep 1, 2014
    #3

  4. Mnlx

    Joined:
    Sep 20, 2009
    Typically set at 43.5, or whatever you want your base to be with the reference line removed, and plugged. The rest is taken care of in the tune.
     
    Mnlx, Sep 1, 2014
    #4

  5. racerron67

    Joined:
    Feb 17, 2014
    ok thanks a lot.
     
    racerron67, Sep 1, 2014
    #5
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