* Replace spark plugs with new ones that are the correct type for your engine.
* Clean or replace the air filter.
* Clean or replace the fuel filter.
* Inspect and clean the throttle body.
* Check the fuel pressure and adjust if necessary.
* Have a professional mechanic check and adjust the ignition timing.
2. Transmission Tune-Up
* Check the transmission fluid level and add fluid if necessary.
* Change the transmission fluid if it is dirty or has a burnt smell.
* Inspect and clean the transmission filter.
* Check and adjust the transmission bands.
3. Brake Tune-Up
* Check the brake fluid level and add fluid if necessary.
* Replace the brake pads if they are worn out.
* Resurface the brake rotors if they are warped or damaged.
* Inspect and clean the brake calipers and rotors.
* Bleed the brake lines to remove any air bubbles.
4. Suspension Tune-Up
* Inspect the suspension components for damage or wear.
* Replace any worn or damaged suspension components.
* Align the wheels to ensure that they are straight.
5. General Maintenance
* Change the oil and filter according to the manufacturer's recommendations.
* Check and top off the coolant level.
* Inspect and clean the battery terminals.
* Check the tire pressure and adjust if necessary.
By following these steps, you can help to keep your Toyota 4Runner in good running condition for many years to come.
