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Home >> GMC >> 1985 >> Safari Van Cargo, 2.5 E, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Pump - Electric >> Testing >> Flow Test
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Flow Test

  1. Disconnect EFI fuel feed line from throttle body. Route line to a 1 quart, calibrated container. Apply battery voltage to terminal "G" of assembly line communications link (ALCL). See Fig 1 . Fuel pump should supply volume of 1/2 pint or more, within 15 seconds.
    Fig 1: Assembly Line Test Link Test link is under left side of instrument panel.
    G10581
  2. If fuel supply is okay, pump is operating properly. If fuel supply is not okay, check for restriction in supply line. Repair or replace line if necessary. If there are no restrictions, perform PRESSURE TEST  in this article.
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