my Ford F-150 12th Generation (2009-2014) has a check engine light on and won't accelerate

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the parking brake engaged.
• Disconnect the battery to prevent any electrical shorts.

2. Clean Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, socket set.
• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner to spray and wipe the inside of the throttle body with a soft cloth.
• Reattach the air intake duct securely.

3. Inspect and Clean MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver.
• Remove the MAF sensor from the intake air duct.
• Spray MAF sensor cleaner onto the sensor element, taking care not to touch it.
• Allow it to dry completely before reinstalling it.

4. Check Fuel System

• Tools Required: Fuel pressure gauge and socket set.
• Locate the fuel pressure test port on the fuel rail and connect the pressure gauge.
• Turn the ignition key to the ON position (do not start) and check fuel pressure; it should be within the manufacturer’s specifications (typically 30-50 psi).
• If pressure is low, inspect the fuel pump and filter for issues.

5. Inspect Electrical Connections

• Tools Required: Multimeter.
• Use the multimeter to check the voltage and resistance at the TPS and MAF sensor connectors.
• Repair or replace any corroded or damaged connectors.

6. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Use a smoke machine to detect leaks in the intake manifold and vacuum hoses, or spray carburetor cleaner around suspected leak areas while the engine is running and listen for changes in idle.
• Repair any identified leaks.