my Ford F-150 stalls at red lights, what could be causing this?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical issues during repair.

2. Fuel System Inspection

• Sub-steps:
  • Locate fuel filter and check for clogs; replace if necessary.
  • Use a fuel pressure gauge to measure fuel pressure at the fuel rail; compare with manufacturer specifications.
  • Inspect fuel injectors for proper operation; clean or replace if faulty.
• Tools Required: Fuel pressure gauge, wrench set, fuel injector cleaner.

3. Ignition System Service

• Sub-steps:
  • Remove spark plugs and inspect for wear or fouling; replace them if necessary.
  • Test ignition coils with a multimeter to ensure they are within specifications; replace any faulty coils.
• Tools Required: Socket set, multimeter, spark plug socket.

4. Idle Air Control (IAC) Valve Inspection

• Sub-steps:
  • Locate the IAC valve on the throttle body.
  • Remove the IAC valve and clean it with throttle body cleaner.
  • Reinstall the IAC valve and ensure it is securely fastened.
• Tools Required: Screwdriver set, throttle body cleaner.

5. Air Intake System Check

• Sub-steps:
  • Inspect the air filter for dirt and replace it if necessary.
  • Check all intake hoses for cracks or leaks and replace if needed.
• Tools Required: Screwdriver set, replacement air filter.