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Vacuum Advance Distributor Specifications

  1. With engine at operating temperature, disconnect vacuum hose from distributor. Run engine at idle.
  2. Using an advance timing light, check ignition timing. Raise engine speed to specified RPM. Check ignition timing. See DISTRIBUTOR ADVANCE SPECIFICATIONS  table.
  3. Connect a vacuum pump to distributor advance unit. With engine running at idle, apply specified vacuum to advance unit. Check ignition timing. See DISTRIBUTOR ADVANCE SPECIFICATIONS  table.
    DISTRIBUTOR ADVANCE SPECIFICATIONS (1)

    Application Centrifugal Degrees @ RPM Vacuum Degrees @ In. Hg
    Montero (2.6L) 0 @ 1600 (2) 0 @ 3.15
    Montero 2.6L 9 @ 2800 8 @ 5.91
    Montero 2.6L 19 @ 6000 20 @ 14.17
    (1) Advance specifications for models not listed are computer controlled.
    (2) Idle advance on Calif. and High Altitude models is zero degrees @ 2.36 in. Hg and 5 degrees @ 3.15 in. Hg.
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