Timing Check
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1988 Ford Ranger, 1988 Ford RV Cutaway, 1988 Ford Pickup, 1988 Ford F-Super Duty, and 1988 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Turn key off, wait 10 seconds. Start engine. Activate KEY ON ENGINE RUNNING (KOER) SELF-TEST . After the last service code has been displayed, the timing will remain fixed for 2 minutes, unless SELF-TEST is deactivated.
- Correct SELF-TEST timing equals base ignition timing (10 degrees BTDC on all engines) plus 17-23 degrees BTDC. If timing is not 27-33 degrees BTDC, go to TEST D13 . If timing is 27-33 degrees BTDC, proceed with KEY ON ENGINE RUNNING (KOER) SELF-TEST.