Actron CP9190 manual Computed Timing Check 1984-1991 EEC-IV Vehicles

Ford Historic (OBD I) Diagnostics

Computed Timing Check (1984-1991 EEC-IV Vehicles)

✓This option of the KOER Read Codes function allows you to check both the Base engine timing (no computer adjustment) and the ability of the computer to control spark advance.

✓This does not apply to 7.3L diesel vehicles.

✓Connect a timing light to the vehicle in accordance with the manufacturer’s instructions. (For 2.3L dual plug engines, use exhaust side plug. Refer to ignition system section in the service manual for specific instructions.)

From the Select Code Type menu:

1.Select Computed Timing.

•Use the UP or DOWN arrow keys until Computed Timing is highlighted.

•Press ENTER.

✓Perform the following step-by-step. Failure to perform these steps may set a false DTC in the PCM — observe the display.

Select Code Type

Fast Codes

Slow Codes

￿Computed Timing

6

!CAUTION

Avoid cooling fan! It may turn on during test.

1)Set parking brake.

2)Transmission in park (P) or neutral (N).

3)Turn A/C off.

4)Start engine and let idle until hot.

5)Turn ignition key off.

6)Wait 10 seconds. start engine and let Idle.

7)If vehicle is equipped with manual transmission, release clutch.

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