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Home >> Mazda >> 1993 >> B2200 Base, 2D Pickup, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - CARBURETED >> Idle Control System >> Idle Speed System >> Idle-Up System (A/T Without A/C & M/T With A/C)
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Idle-Up System (A/T Without A/C & M/T With A/C)

  1. Warm engine to operating temperature, and run at idle speed. All accessories must be off. Connect tachometer to engine. Disconnect vacuum hose from idle-up system servo diaphragm, located on right side of carburetor. See Figure .
  2. Connect intake manifold vacuum directly to servo diaphragm and verify engine speed is 920-970 RPM (auto. trans.) or 1300-1500 RPM (man. trans. with A/C). If RPM is not within specification, adjust by turning screw on servo arm.
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