Mazda MX-5 NA silhouetteMX-5 NA

ENGINE TUNE-UP PROCEDURE

B-8prose procedure
Continued from B-7

IGNITION TIMING, IDLE SPEED

Preparation

  1. 1
    Check the engine condition (spark plugs, leaks in hoses, etc.).
  2. 2
    Warm up the engine to normal operating temperature.
  3. 3
    Make sure all accessories are OFF.
    Do not ground the power connector terminal (Blue: 1-pin); the wiper 20A fuse will be burned.
    When using an externally powered timing light and/or tachometer, connect it to the power connector (Blue: 1-pin).
    Engine bay close-up showing the POWER CONNECTOR (BLUE: 1-PIN) used for connecting an externally powered timing light/tachometer.
    05U0BX-278
  4. 4
    Connect a timing light and a tachometer to the diagnosis connector terminal IG-.
    Be extremely careful when making connections to the diagnosis connector because a mistaken connection will cause a malfunction.
    Diagnosis connector view with inset diagram highlighting the IG- terminal location for timing light/tachometer connection.
    05U0BX-288
  5. 5
    Connect the SST.
    SST 49 B019 9A0 system selector connected to engine wiring with TEST SW. label visible. Shows the connection point during ignition timing inspection.
    05U0BX-279
  6. 6
    Set the SST switch A to 1 position and test switch to SELF TEST position.
    If the SST is not used, jump across the (TEN) terminal and the (GND) terminal of the diagnosis connector.

Ignition Timing

Inspection / Adjustment

  1. 1
    Check the idle speed and set it to specification if necessary.
  2. 2
    Verify that the timing mark (Yellow) on the crankshaft pulley is aligned with the timing belt lower cover mark.
    Engine view showing the crankshaft pulley area with the yellow timing mark aligned to the timing belt lower cover mark.
    05U0BX-281
Idle speedNeutral
850 ± 50 rpm
Ignition timingat idle speed
10° ± 1° BTDC
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