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HOMESERVICE MANUALSMAZDA1991MX-6 LX, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSIDLE SPEED & MIXTUREIDLE MIXTUREB2200 (CARBURETED)
1991 Mazda MX-6 LX, Standard

B2200 (Carbureted)

1991 Mazda MX-6 LX, StandardSECTION B2200 (Carbureted)
  1. Check for presence of mixture screw roll pin. See Fig 1 . If roll pin has already been removed, go to next step. If roll pin is present, remove carburetor. Drive out mixture screw roll pin. Install carburetor.
    Fig 1: B2200 Carbureted Removing Carburetor Mixture Screw Roll Pin
    G61105Courtesy of MAZDA MOTORS CORP.
  2. Install air cleaner. Ensure idle compensator valve is closed. Warm engine to normal operating temperature. Connect dwell meter (on 4-cylinder setting) between ground and mixture check connector. See Fig 2 .
    Fig 2: B2200 Carbureted Connecting Meter to Mixture Check Connector
    G61104Courtesy of MAZDA MOTORS CORP.
  3. Adjust idle speed to 825 RPM. Turn mixture adjusting screw until dwell reading is 27-45 degrees. Reset idle speed (if necessary). Replace mixture roll pin after adjustment. If mixture cannot be adjusted to specification, see appropriate TESTS W/O CODES article in the ENGINE PERFORMANCE section.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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