Computed Timing Check

Ensure all accessories are off and engine is at normal operating temperature. Disconnect SPOUT connector. Connect timing light. Using ignition switch, start engine. Ignition timing should be approximately 10 degrees BTDC (base timing). Reconnect SPOUT connector. Timing should advance from base timing. If timing is not as specified, check for causes of incorrect timing such as damaged Crankshaft Position (CKP) sensor. For additional procedure, see IGNITION CHECKS in F-BASIC TESTING article in this section.