my Toyota Corolla E210 (2019-2024) engine sputters when I accelerate, what's happening?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil(s) to access the spark plugs using a socket set.
• Inspect each spark plug for wear, carbon buildup, or damage.
• Replace with OEM-spec spark plugs if necessary, tightening to the manufacturer’s torque specification (usually around 13-15 ft-lbs).

3. Check and Clean the MAF Sensor

• Locate the MAF sensor in the air intake system.
• Disconnect the electrical connector and remove the sensor.
• Clean the MAF sensor using MAF cleaner spray (do not use other cleaners) and allow it to dry.
• Reinstall the sensor and ensure the electrical connector is secured.

4. Inspect Fuel System

• Check the fuel filter for clogs; replace if it appears dirty.
• Inspect fuel lines for leaks or cracks; replace any damaged sections.
• Test the fuel pump operation by measuring fuel pressure at the fuel rail; it should be within manufacturer specifications (generally around 50-60 psi).

5. Clean or Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Inspect for dirt or blockage; replace with a new filter if necessary.
• Ensure the housing is sealed properly before closing.