how to troubleshoot my Ford F-150 13th Generation (2015-2020) that keeps stalling?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal for safety.
• Ensure the vehicle is on a flat surface and use wheel chocks.

2. Fuel System Inspection

• Sub-step 1: Access the fuel pump relay in the fuse box and test for proper operation using a multimeter.
• Sub-step 2: Check fuel pressure using a fuel pressure gauge. Compare the reading to the manufacturer's specifications (usually around 30-45 PSI).
• Sub-step 3: Replace the fuel filter if it is clogged or has not been changed in the last 30,000 miles.

3. Air Intake System Check

• Sub-step 1: Remove the air filter and inspect it for dirt or blockages. Replace if necessary.
• Sub-step 2: Clean the throttle body using throttle body cleaner and a soft cloth to remove carbon buildup.
• Sub-step 3: Ensure there are no vacuum leaks in the intake manifold or around the throttle body.

4. Ignition System Examination

• Sub-step 1: Remove spark plugs and inspect for wear and carbon deposits. Replace if necessary.
• Sub-step 2: Test ignition coils with a multimeter for proper resistance. Replace any faulty coils.
• Sub-step 3: Check wiring and connectors for corrosion or damage.

5. Electrical System Verification

• Sub-step 1: Use a multimeter to test the battery voltage; it should be around 12.6 volts when the engine is off and 13.7-14.7 volts when running.
• Sub-step 2: Inspect the alternator belt for wear and proper tension.
• Sub-step 3: Replace the battery if it shows signs of weakness or fails a load test.

6. Sensor Testing

• Sub-step 1: Use a scanner to monitor MAF readings; they should correlate with engine RPM.
• Sub-step 2: Test the TPS for proper voltage output at various throttle positions.
• Sub-step 3: Replace any faulty sensors based on the diagnostic results.