Mazda MX-5 NA silhouetteMX-5 NA

ENGINE TUNE-UP

F-76prose procedure
Continued from F-75

Ignition Timing (continued)

  1. 4
    If the marks are not aligned, loosen the crank angle sensor lock bolt, and turn the crank angle sensor to make the adjustment.
    Underhood photo showing the crank angle sensor and its lock bolt, illustrating loosening the lock bolt and turning the crank angle sensor to adjust ignition timing.
    05U0FX-062
  2. 5
    Tighten the crank angle sensor lock bolt to the specified torque.
  3. 6
    After adjusting the ignition timing, disconnect the SST or jumper wire from the diagnosis connector.
  4. 7
    Increase the engine speed and verify that the ignition timing advances.
    Close-up of the crankshaft pulley and timing scale on the timing belt cover; used when verifying that ignition timing advances as engine speed is increased.
    05U0FX-063
Tightening torque (crank angle sensor lock bolt)
19 - 25N·m

Idle Speed

  1. 1
    Connect the SST and set the TEST SW to 'SELF TEST' or connect diagnosis connector terminals TEN and GND with a jumper wire.
    System Selector SST (49 B019 9A0) connected at the diagnosis connector with TEST SW. selected and the diagnosis connector pin layout showing GND and TEN terminals. Used at Step 1 of Idle Speed adjustment.
    05U0FX-064
  2. 2
    Verify that the idle speed is within specification.
  3. 3
    If the idle speed is not within specification, remove the blind cap from the air adjusting screw and adjust it.
    Underhood photo locating the air adjusting screw with its blind cap removed; used to adjust idle speed.
    05U0FX-065
  4. 4
    After adjusting the idle speed, install the blind cap and disconnect the SST or jumper wire from the diagnosis connector.
Idle speed
850 ± 50rpm
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