Instead of adjusting timing, you'd diagnose issues related to ignition timing by checking for:
* Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to read any stored codes. These codes will pinpoint potential problems with the ignition system, sensors (like the crankshaft position sensor or camshaft position sensor), or the PCM itself. This is the crucial first step.
* Sensor Performance: Faulty sensors can lead to incorrect timing information being sent to the PCM. Test the crankshaft position sensor, camshaft position sensor, and other relevant sensors as indicated by any DTCs or if symptoms suggest a sensor malfunction.
* PCM Issues: In rare cases, the PCM itself might be faulty. This is usually diagnosed by process of elimination after checking all other components.
* Wiring and Connections: Inspect all wiring and connections related to the ignition system for damage or corrosion.
In short: You don't adjust the timing on this engine; you diagnose and repair problems within the electronic ignition system. Taking it to a qualified mechanic or using a professional-level diagnostic tool is recommended if you're experiencing problems related to ignition timing or performance.