1990 Ford Bronco II RWD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE

Initial Timing

  1. Place transmission in Park or Neutral. Ensure A/C and heater are off. Connect inductive timing light. Disconnect the single wire in-line spout (Yellow/Light Green wire near distributor) connector or remove the shorting bar from the double wire spout connector. See Fig 1 . Start and warm engine to normal operating temperature.
  2. With engine at idle speed, check/adjust initial timing to 10 degrees BTDC. Reconnect the single wire in-line spout connector or reinstall the shorting bar on double wire spout connector. Accelerate engine and check timing advance to see if distributor is advancing beyond initial setting. Reconnect vacuum hoses and remove jumper wire from ignition connector and reconnect connector.
Fig 1: Shorting Bar Location
G118193Courtesy of FORD MOTOR CO.
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