why does my Toyota Tacoma N300 (2016-Present) have a rough idle when cold

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety.

2. Clean Throttle Body

• Tools Required: Throttle body cleaner, soft brush, rags.
• Remove the air intake duct to access the throttle body.
• Spray throttle body cleaner on the throttle plate and inside the throttle body.
• Scrub gently with a soft brush to remove carbon deposits.
• Wipe clean with a rag and reassemble the air intake duct.

3. Inspect and Clean IAC Valve

• Tools Required: Socket set, cleaning solvent.
• Locate the IAC valve on the throttle body.
• Disconnect the electrical connector and remove the IAC valve.
• Clean the valve and its seat using cleaning solvent.
• Reinstall the IAC valve and reconnect the electrical connector.

4. Check MAF Sensor

• Tools Required: Torx screwdriver, MAF cleaner.
• Remove the MAF sensor from the air intake duct.
• Spray MAF cleaner onto the sensor elements without touching them.
• Allow it to dry, then reinstall the sensor.

5. Fuel System Inspection

• Tools Required: Fuel pressure gauge, wrenches.
• Connect a fuel pressure gauge to the fuel rail.
• Check the pressure against manufacturer specifications.
• If pressure is low, check the fuel filter and replace if necessary.