Therefore, you can't "time" it like a points-and-distributor system. Instead, any timing-related issues are addressed by:
* Diagnosing the problem: A misfire, poor running, or other symptoms often point to a timing problem, but it's rarely a matter of mechanical timing adjustment. Use a scan tool to check for diagnostic trouble codes (DTCs). Common causes related to timing include:
* Optispark issues: This is a frequent failure point on these engines. Problems with the Optispark module itself, its wiring, the crankshaft position sensor (CKP) integrated within it, or even the distributor cap can manifest as timing-related symptoms. Replacing the Optispark is often the solution.
* Camshaft Position Sensor (CMP) issues: A faulty CMP sensor can also severely affect timing.
* Crankshaft Position Sensor (CKP) issues: As mentioned, this is part of the Optispark assembly.
* PCM Problems: A faulty PCM can misinterpret signals and cause incorrect timing. This is less common but possible.
* Wiring Problems: Damaged or corroded wiring related to any of the sensors can cause similar problems.
* Using a scan tool: A professional-grade scan tool can read live data, including timing information. This allows a mechanic to see if the timing is within the specified range and identify any discrepancies. This is the *only* way to check "timing" on this system.
* Repairing or replacing faulty components: Based on the diagnostics, the solution will involve replacing the faulty sensor (Optispark, CMP, CKP) or repairing wiring issues, possibly the PCM as a last resort.
In short: You don't adjust the timing on a 1994 Cadillac Fleetwood 5.7L. You diagnose and fix the underlying electronic problem. Attempting to adjust it mechanically could severely damage the engine. Take it to a qualified mechanic with a suitable scan tool for proper diagnosis and repair.
