Mazda MX-3 silhouetteMX-3

ENGINE TUNE-UP

F2-71prose procedure
Continued from F2-70

Ignition Timing (continued)

  1. 6
    Make sure the timing mark (yellow) on the crankshaft pulley and the mark on the timing belt cover are aligned.
    Ignition timing: BTDC 9–11° {10 ± 1°}
    Illustration of the crankshaft pulley and timing belt cover timing marks, showing the timing scale used to verify ignition timing alignment.
  2. 7
    If the marks are not aligned, loosen the distributor lock bolts and turn the distributor to make the adjustment.
    Illustration of the distributor with a curved double-headed arrow indicating rotation to adjust ignition timing. Shows the distributor cap and lock bolts.
  3. 8
    Tighten the distributor lock bolts to the specified torque.
    Tightening torque: 19–25 N·m {1.9–2.6 kgf·m, 14–18 ft·lbf}
  4. 9
    Disconnect the SST.
  5. 10
    Check if the timing mark (yellow) on the crankshaft pulley and the mark on the timing belt cover are aligned.
    Ignition Timing: BTDC 6–18°
Ignition timingduring adjustment (step 6)
BTDC 9–11° {10 ± 1°}degrees BTDC
Distributor lock bolt
19 - 25N·m
Ignition Timingcheck after adjustment (step 10)
BTDC 6–18°degrees BTDC

Idle Speed

  1. 1
    Perform "Preparation". (Refer to page F2-70.)
  2. 2
    With the coolant fan off, verify that the idle speed is within the specification.
    Idle speed: 640–700 rpm {670 ± 30 rpm}
  3. 3
    If not within the specification, adjust the idle speed by turning the air adjusting screw.
    Illustration of the air adjusting screw being turned with a screwdriver to adjust idle speed, on the throttle body / intake.
Idle speedcoolant fan off
640–700 rpm {670 ± 30 rpm}rpm
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See also

page F2-70

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