Essential Items:
* Spark Plugs: These are crucial. You'll need the correct type and heat range for your specific engine. Consult your owner's manual or a parts store using your VIN.
* Wires (Spark Plug Cables): If they're cracked, brittle, or show signs of wear, replace them. Again, get the correct ones for your engine.
* Air Filter: A clogged air filter restricts airflow, impacting performance and fuel economy. Replace it with a new one.
* Fuel Filter: This is less frequent than spark plugs/wires, but it's important for fuel delivery. The frequency of replacement depends on mileage and driving conditions; check your owner's manual for recommendations.
Items to Consider (depending on mileage and condition):
* PCV Valve (Positive Crankcase Ventilation): This helps remove blow-by gases from the crankcase. It's relatively inexpensive and should be inspected and replaced if necessary.
* Throttle Body Cleaning: A dirty throttle body can cause rough idling and poor performance. Cleaning it can often improve drivability. This is often best done with a specialized cleaner and possibly some tools to remove the throttle body.
* Mass Airflow Sensor (MAF) Cleaning: Similar to the throttle body, a dirty MAF sensor can lead to performance problems. Cleaning it (carefully!) can sometimes fix issues. Replacement may be necessary if cleaning doesn't help.
* Ignition Coil(s): If you're experiencing misfires, failing ignition coils could be the culprit. These require testing to diagnose.
* Distributor Cap and Rotor (if applicable): This is less likely on a 2001 Expedition, as most likely it has coil-on-plug ignition, but if it has a distributor, these should be checked for wear.
Tools You'll Likely Need:
* Socket set (metric)
* Wrenches (metric)
* Spark plug socket (deep well)
* Ratchet
* Extension bars
* Possibly a torque wrench (for proper tightening of spark plugs and other components)
* Possibly a throttle body cleaner and appropriate cleaning tools
Important Notes:
* Consult your owner's manual: This is the best source for recommended maintenance schedules and specifications for your specific Expedition.
* Check for recalls and technical service bulletins (TSBs): Ford may have issued recalls or TSBs addressing common issues on your model year.
* Consider professional help: If you're not comfortable performing these tasks yourself, take your Expedition to a qualified mechanic. Improper maintenance can cause damage to your engine.
This is not an exhaustive list, but it covers the most common aspects of a "tune-up" for a vehicle of this age and type. Remember safety first; disconnect the negative battery cable before working on any electrical components.
