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my Ford F-150 has rough idle when in gear what could be wrong - Ford F-150
Home/Cars/Ford/F-150/13th Generation (2015-2020)/my Ford F-150 has rough idle when in gear what could be wrong

my Ford F-150 has rough idle when in gear 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
535 words

Problem Statement

Learn how to diagnose and fix rough idle issues in Ford F-150. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component
Engine
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect battery before working on electrical systems
  • •Allow the engine to cool before performing maintenance on the throttle body or fuel system

Symptoms

  • •Rough idle while in gear
  • •Engine stalling at low RPMs
  • •Decreased acceleration power
  • •Unusual vibrations felt in the cabin
  • •Check engine light illuminated

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
  • •Fuel pressure gauge
  • •Throttle body cleaner
  • •Torque wrench

Parts Required

  • •Air filter
  • •Fuel filter
  • •Spark plugs
  • •Ignition coils (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 necessary tools and parts.
  • Disconnect the battery to prevent electrical shorts.
2. Clean or Replace Air Filter
  • Remove the air filter housing cover using a socket set.
  • Take out the air filter and inspect for dirt or blockages.
  • Clean or replace the air filter as necessary.
  • Reassemble the air filter housing cover securely.
3. Fuel System Inspection
  • Connect a fuel pressure gauge to the fuel rail.
  • Start the engine and observe the fuel pressure reading; it should match the manufacturer's specifications.
  • If low, check the fuel pump and fuel filter for clogs or failures.
  • Replace the fuel filter if necessary, and ensure proper fuel line connections.
4. Inspect and Replace Ignition Components
  • Remove the ignition coils and inspect for cracks or corrosion.
  • Replace any faulty ignition coils and spark plugs with new ones.
  • Torque the spark plugs to the specified value (typically around 12-15 lb-ft).
5. Clean Throttle Body
  • Remove the air intake duct to access the throttle body.
  • Use throttle body cleaner and a clean rag to remove carbon buildup from the throttle plate and bore.
  • Reassemble the intake duct and ensure all connections are secure.
6. Check Engine and Transmission Mounts
  • Visually inspect engine and transmission mounts for cracks or separation.
  • If damaged, replace the mounts, ensuring proper alignment and torque as specified by the manufacturer.