What you might be referring to is adjusting the ignition timing, but that's not done mechanically at the distributor on this engine. Ignition timing is controlled by the engine control module (ECM) electronically. Attempting to adjust timing manually by messing with the components where the distributor would be on an older vehicle will damage the system and likely cause the engine to not run.
If your S10 4 cylinder is running poorly, potential issues and their solutions include:
* Spark Plugs and Wires: Inspect and replace if necessary. Worn or fouled plugs significantly affect performance.
* Ignition Coil(s): A failing coil pack will cause misfires. Testing is required to diagnose a faulty coil.
* PCV Valve: A clogged PCV valve can cause poor running and rough idling. Replace if needed.
* Air Filter: A clogged air filter restricts airflow and reduces power. Replace with a new filter.
* Throttle Body: A dirty throttle body can lead to poor idle and performance. Clean it with throttle body cleaner.
* Mass Airflow Sensor (MAF): A faulty MAF sensor can cause inaccurate fuel delivery. It often needs professional cleaning or replacement.
* ECM Issues: Problems with the engine control module are more complex and often require professional diagnosis and repair.
In short: To "tune up" a 2000 Chevy S10 4-cylinder, focus on the components listed above. You cannot adjust the ignition timing at a "distributor" because there isn't one. If you suspect a serious problem, take it to a qualified mechanic. Attempting to adjust things you don't understand in the ignition system can lead to significant damage.
