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Home >> Ford >> 1994 >> Aspire Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> Idle Speed

Idle Speed

  1. Ensure ignition timing is set to specification. See IGNITION TIMING  . Turn off all accessories. Set automatic transmission lever to Park position, or manual transmission lever to Neutral position. Set parking brake.
  2. Connect tachometer to engine. Warm engine to normal operating temperature. Connect a jumper wire between STI test connector and ground. See Figure .
  3. Locate Idle Speed Control By-Pass Air (ISC-BPA) valve on intake manifold. Remove cap, and adjust idle speed to 650-750 RPM (manual transmission) or 700-800 RPM (automatic transmission) by rotating idle air adjust screw on ISC-BPA valve. See Fig 1 . Remove jumper wire.
Fig 1: Locating Idle Air Adjuster Screw
G94D44134Courtesy of FORD MOTOR CO.
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