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how to fix rough idle on Ford F-150 13th Generation (2015-2020) - Ford F-150
Home/Cars/Ford/F-150/13th Generation (2015-2020)/how to fix rough idle on Ford F-150 13th Generation (2015-2020)

how to fix rough idle on Ford F-150 13th Generation (2015-2020)

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

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
620 words

Problem Statement

Learn how to diagnose and fix rough idle issues on Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component
Engine
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems.
  • •Relieve fuel system pressure before disconnecting fuel lines.

Symptoms

  • •Check engine light illuminated
  • •Engine vibrates excessively at idle
  • •Fluctuating RPMs while stationary
  • •Poor acceleration during driving
  • •Increased fuel consumption
  • •Unusual exhaust noise

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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
  • •Torque wrench
  • •Screwdriver set
  • •Fuel injector cleaner
  • •Fuel line disconnect tool

Parts Required

  • •Air filter
  • •Spark plugs
  • •Fuel injectors (if necessary)
  • •Vacuum hoses (if damaged)

Additional Information

Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
4 items

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Solution
1. Preparation
  • Gather tools and parts needed for repair.
  • Disconnect the negative battery terminal.
  • Ensure the vehicle is on a flat surface and secured with wheel chocks.
2. Replace Air Filter
  • Tools Required: Screwdriver, new air filter.
  • Remove the air intake cover by loosening the screws.
  • Take out the old air filter and clean the air box if necessary.
  • Install the new air filter and reattach the cover.
3. Replace Spark Plugs
  • Tools Required: Socket set, torque wrench, spark plug socket.
  • Remove the ignition coil harness from each spark plug.
  • Using the spark plug socket, unscrew and remove the old spark plugs.
  • Install new spark plugs, ensuring to use the correct torque as specified in the service manual (usually around 13-15 lb-ft).
  • Reconnect the ignition coil harness.
4. Clean or Replace Fuel Injectors
  • Tools Required: Fuel injector cleaner, fuel line disconnect tool.
  • Relieve fuel system pressure using the service manual procedures.
  • Disconnect the fuel lines and electrical connectors from the fuel injectors.
  • Remove the fuel rail to access the injectors.
  • Clean the injectors using a fuel injector cleaning kit or replace them if necessary.
  • Reinstall the fuel rail and reconnect fuel lines and electrical connectors.
5. Inspect and Repair Vacuum Leaks
  • Tools Required: Vacuum gauge, hose clamps.
  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a vacuum gauge to check the intake manifold for leaks.
  • Replace any damaged hoses and ensure all connections are secure.
6. Clean Idle Air Control (IAC) Valve
  • Tools Required: Torx screwdriver, throttle body cleaner.
  • Locate the IAC valve, usually found on the throttle body.
  • Remove the IAC valve using the appropriate screwdriver.
  • Clean the valve and the mounting area using throttle body cleaner.
  • Reinstall the IAC valve and reconnect any electrical connectors.