However, routine maintenance that was once considered part of a "tune-up" is still crucial:
For ALL engines:
* Spark Plugs: Replace according to the recommended interval in your owner's manual. This is typically every 30,000-100,000 miles, depending on the engine and your driving conditions. Using the wrong type of spark plug can damage your engine. Always consult your owner's manual for the correct type.
* Wires (if applicable): Some Rangers might still use ignition wires. If your engine has them and they show signs of wear (cracks, brittleness), replace them.
* Air Filter: Replace this every 12,000-15,000 miles, or more frequently if you drive in dusty conditions. A clogged air filter reduces engine performance and fuel efficiency.
* PCV Valve (Positive Crankcase Ventilation): This valve helps prevent crankcase pressure buildup. Inspect and replace it if necessary (often every 30,000-60,000 miles). A faulty PCV valve can lead to increased oil consumption and reduced engine performance.
* Fuel Filter: This should be replaced every 30,000-60,000 miles, or as recommended in your owner's manual. A clogged fuel filter restricts fuel flow, leading to poor engine performance.
Things that *aren't* typically part of a "tune-up" but are crucial maintenance:
* Throttle Body Cleaning: Accumulated grime can affect throttle response. Cleaning it every few years or as needed is a good idea. You can do this yourself (with the right cleaner and care) or have a mechanic do it.
* Mass Airflow Sensor (MAF) Cleaning: The MAF sensor measures the amount of air entering the engine. A dirty MAF sensor can cause poor performance. Cleaning it (gently, with the right cleaner) can improve things.
* Checking and Adjusting Valve Lash (if applicable): Some older engines (and possibly some 2.3L and 2.5L in your Ranger) require occasional valve lash adjustment, but it's unlikely needed unless the engine is experiencing problems. This is a more advanced procedure.
Before you start any work:
1. Consult your owner's manual: This is the most important step. It will specify the correct parts, torque specifications, and maintenance intervals for your specific engine.
2. Disconnect the negative battery cable: This is a safety precaution to prevent accidental shorts or damage to the electrical system.
If you are not comfortable performing these tasks yourself, it's best to take your Ranger to a qualified mechanic. Improper maintenance can cause serious engine damage. Mention the specific engine size when you contact a mechanic.
