Here's why:
* Fuel filters are designed to catch contaminants before they reach the engine. Placing one inside the throttle body would be ineffective.
* Throttle bodies control airflow. They are not designed to filter fuel.
* Fuel filters are typically located in the fuel lines, either near the fuel tank or close to the engine.
Where to find the fuel filter:
* On the fuel line: Look for a cylindrical metal or plastic component near the fuel tank or close to the engine.
* Consult your owner's manual: It should provide a diagram and location of the fuel filter.
* Use a repair manual: A repair manual specific to your 1990 S-10 4.3L will provide details on the fuel filter's location.
Remember, it's crucial to have a clean fuel filter for proper engine performance and longevity.