how to fix the P0300 random misfire code on my Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plugs

1. Remove the spark plug wires or ignition coil connectors.
2. Use a spark plug socket to remove the spark plugs.
3. Inspect the condition of each spark plug; replace any that show signs of wear (e.g., fouling, excessive wear).
4. Gap new spark plugs according to manufacturer specifications (typically around 0.044 inches for Tacoma).
5. Install new spark plugs and reconnect the ignition coils.

3. Inspect and Replace Ignition Coils

1. Remove the ignition coils from their respective positions by unscrewing the mounting bolts.
2. Inspect for cracks or damage on the ignition coils.
3. Replace any faulty ignition coils with new ones from a reputable manufacturer.
4. Reinstall the ignition coils and secure them with bolts.

4. Fuel System Inspection

1. Connect a fuel pressure gauge to the fuel rail.
2. Start the engine and check the fuel pressure against manufacturer specifications (usually around 50-60 psi for Tacoma).
3. If pressure is low, check the fuel pump, fuel filter, and fuel injectors for proper operation.
4. Replace any components that are defective.

5. Inspect Vacuum Lines and Air Intake

1. Visually inspect all vacuum lines for damage, cracks, or disconnections.
2. Repair or replace any damaged vacuum lines.
3. Check the air intake for any obstructions or leaks; clean or replace any damaged components.