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my Ford F-150 13th Generation (2015-2020) has a rough idle after a tune-up, what could be wrong? - Ford F-150
Home/Cars/Ford/F-150/13th Generation (2015-2020)/my Ford F-150 13th Generation (2015-2020) has a rough idle after a tune-up, what could be wrong?

my Ford F-150 13th Generation (2015-2020) has a rough idle after a tune-up, what could be wrong?

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

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

Problem Statement

Learn how to diagnose and fix rough idle issues in 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
  • •Allow the engine to cool before opening components around it

Symptoms

  • •Check engine light illuminated
  • •Engine stalling or hesitation during idle
  • •Increased fuel consumption
  • •Rough engine vibrations at idle
  • •Unusual engine noises (e.g., misfiring sounds)

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
  • •Spark plug socket
  • •Torque wrench
  • •Fuel pressure gauge
  • •Basic hand tools (sockets, wrenches, screwdrivers)

Parts Required

  • •Spark plugs
  • •Ignition coils (if needed)
  • •Fuel filter (if needed)
  • •Vacuum hoses (if needed)

Additional Information

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

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Solution
1. Preparation
  • Gather all tools and parts.
  • Disconnect the battery to ensure safety.
  • Ensure the engine is cool before beginning work.
2. Inspect and Replace Spark Plugs
  • Remove the spark plug wires or ignition coils carefully.
  • Using a spark plug socket, unscrew the spark plugs.
  • Inspect each spark plug for wear, carbon deposits, or incorrect gap.
  • Replace with new spark plugs that meet OEM specifications.
  • Reinstall the spark plugs, tightening to the manufacturer's torque specification (typically around 13-15 lb-ft for Ford engines).
3. Check and Replace Ignition Coils (if needed)
  • If any ignition coils show signs of damage or misfire codes, replace them.
  • Remove the retaining bolts and disconnect the electrical connector from the ignition coil.
  • Install new ignition coils, ensuring they click into place and reconnect the electrical connectors.
4. Verify Fuel System
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the ON position (do not start) to check fuel pressure.
  • If the pressure is below specifications, inspect the fuel filter and fuel pump for issues. Replace as necessary.
5. Inspect Air Intake and Vacuum System
  • Check the air filter for cleanliness and replace if dirty.
  • Inspect the intake manifold and throttle body for any debris or obstructions.
  • Examine all vacuum hoses for cracks or loose connections and replace any faulty hoses.