EVAP & Fuel Pressure Problem

Discussion in 'SN95 4.6L Mustang' started by BrightBlue00GT, Jul 29, 2009.

  1. BrightBlue00GT I am even OLDER than Hawk!

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    No codes, but during my OBDII scans I am showing these failed tests:

    $21 EVAPI (Evaporative Fuel Tank Pressure Initial Low-High...)
    $25 EVAPRISEL4

    And yes the car runs poorly. Feels like it has a misfire, but I'm sure it's not an electrical (plugs) misfire. Poor power, the fuel press gauge fluctuates almost in tune with what appears to be the misfire (again, it's not).

    I assume I need to test the evap system. Any way to do that short of a shop doing it?

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