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Home/Cars/Ford/F-150/13th Generation (2015-2020)/how to fix a Ford F-150 13th Generation (2015-2020) that stalls when idling

how to fix a Ford F-150 13th Generation (2015-2020) that stalls when idling

Ford F-150 13th Generation (2015-2020)

Severity: highDifficulty: medium2-4 hours
3 min read
588 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix stalling issues when idling in a Ford F-150 (2015-2020). Step-by-step guide with diagnostic steps and repair instructions.

Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect battery before working on electrical systems.
  • ⚠Allow the engine to cool before performing repairs to avoid burns.

Symptoms

  • •Engine stalls when idling
  • •Rough idle or engine vibrations
  • •Check engine light illuminated
  • •Increased fuel consumption
  • •Difficulty starting the engine after stalling

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify any underlying issues.
  2. 2Inspect the air filter for clogs or debris affecting airflow.
  3. 3Check fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
  4. 4Examine the idle air control (IAC) valve for carbon buildup or malfunction.
  5. 5Inspect vacuum lines for leaks that could disrupt air intake.
  6. 6Test the battery and alternator to ensure electrical systems are functioning correctly.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the battery to ensure safety during repairs.

2. Clean or Replace the Idle Air Control (IAC) Valve

  • Tools Required: Socket set, cleaning solvent, soft brush, torque wrench.
  • Sub-steps:
    1. Locate the IAC valve, typically near the throttle body.
    2. Remove any electrical connectors attached to the valve.
    3. Unscrew the mounting bolts and remove the IAC valve.
    4. Clean the valve with solvent and a soft brush, or replace it if damaged.
    5. Reinstall the IAC valve, ensuring it is securely fastened to the throttle body.

3. Inspect and Clean the Throttle Body

  • Tools Required: Throttle body cleaner, socket set, soft cloth.
  • Sub-steps:
    1. Remove the intake hose connected to the throttle body.
    2. Use throttle body cleaner to thoroughly clean the inside of the throttle body.
    3. Wipe away excess cleaner with a soft cloth.
    4. Reattach the intake hose securely.

4. Check and Repair Vacuum Leaks

  • Tools Required: Smoke machine (if available), vacuum gauge.
  • Sub-steps:
    1. Inspect all vacuum lines for cracks or disconnections.
    2. Use a smoke machine to detect leaks or spray soapy water on lines while the engine is running.
    3. Replace any damaged vacuum lines.
    4. Ensure all connections are tight and secure.

5. Test Fuel Pressure

  • Tools Required: Fuel pressure gauge.
  • Sub-steps:
    1. Locate the fuel rail and connect the fuel pressure gauge to the test port.
    2. Turn the ignition to the "ON" position without starting the engine and check the fuel pressure reading.
    3. Compare the reading to manufacturer specifications (typically around 30-50 PSI).
    4. If pressure is low, inspect the fuel pump and fuel filter for issues.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Socket set
  • Throttle body cleaner
  • Fuel pressure gauge
  • Torque wrench
  • Cleaning solvent
  • Soft brush
  • Soft cloth

Parts Required

  • Idle air control (IAC) valve (if replacement is necessary)
  • Vacuum hoses (if any are damaged)

Additional Information

Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

8 items

Parts

2 items

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