What you might be experiencing that *feels* like a timing issue could be one of several problems:
* Misfire: This is the most common cause of symptoms that might be mistaken for timing problems. A misfire causes poor performance, rough running, and potentially a check engine light. Diagnosis involves checking spark plugs, wires, ignition coils, and the fuel system.
* Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP) problems: These sensors tell the PCM where the engine is in its cycle. A faulty sensor will lead to poor running or a no-start condition. Replacing the sensor is usually the solution.
* Vacuum leaks: Leaks in the intake manifold or vacuum lines can cause erratic engine behavior. A visual inspection is often needed.
* Throttle Position Sensor (TPS) issues: A faulty TPS can cause poor throttle response and uneven running.
* PCM issues: While less common, a faulty PCM can cause a wide range of problems, including timing-related symptoms. This is a more involved and expensive diagnosis/repair.
Instead of trying to "time" the engine, you need to diagnose the underlying problem. Here's what you should do:
1. Check the check engine light: If it's on, get the diagnostic trouble codes (DTCs) read using an OBD-II scanner. Auto parts stores often offer this service for free. The codes will point you towards the likely culprit.
2. Inspect visually: Look for obvious problems like loose or damaged spark plug wires, vacuum leaks, or anything unusual under the hood.
3. If you have a basic understanding of automotive repair and the appropriate tools: You could check for things like spark, compression, and fuel pressure (but be careful and consult a repair manual).
4. Consult a repair manual: A repair manual specific to your year and engine will provide detailed diagnostic procedures.
5. Take it to a mechanic: If you're not comfortable working on your vehicle, take it to a qualified mechanic for diagnosis and repair.
Trying to adjust the ignition timing on a modern electronically controlled engine without the proper equipment and knowledge is extremely risky and could damage your engine. Focus on diagnosing the actual problem, not on adjusting something that isn't adjustable in this way.
