why does my Ford Explorer Fifth Generation (2011-2019) have a rough idle when in gear

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

605 words

Problem Statement

Learn how to diagnose and fix rough idle issues in Ford Explorer Fifth Generation (2011-2019). 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 the battery before working on electrical systems.
•Allow the engine to cool before performing any maintenance.

Symptoms

•Rough engine idle when the vehicle is in gear
•Increased engine vibrations felt in the cabin
•Check engine light illuminated
•Decreased fuel efficiency
•Engine stalling during idle or low-speed conditions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the engine air filter for clogs or restrictions that could affect airflow.
3
Check the spark plugs for wear or fouling, as they can impact combustion.
4
Examine the fuel system for proper pressure and flow, including checking the fuel injectors.
5
Inspect the engine mounts for wear or damage, which can contribute to vibrations.
6
Check for vacuum leaks in hoses or intake manifold that could disrupt air-fuel mixture.

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
•Fuel pressure gauge
•Vacuum gauge

Parts Required

•Spark plugs
•Fuel filter
•Fuel injectors (if needed)
•Engine mounts (if needed)
•Vacuum hoses (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the engine air filter for clogs or restrictions that could affect airflow.
3
Check the spark plugs for wear or fouling, as they can impact combustion.
4
Examine the fuel system for proper pressure and flow, including checking the fuel injectors.
5
Inspect the engine mounts for wear or damage, which can contribute to vibrations.
6
Check for vacuum leaks in hoses or intake manifold that could disrupt air-fuel mixture.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, torque wrench, fuel pressure gauge, vacuum gauge.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to ensure safety when working on electrical components.

2. Addressing Engine Codes

Connect the OBD-II scanner and retrieve any stored error codes.
Document the codes and clear them from the system.
Investigate specific codes related to misfires, air-fuel mixture, or sensor issues.

3. Inspect and Replace Spark Plugs

Remove the ignition coils using the socket set.
Extract the old spark plugs with a spark plug socket.
Inspect the condition of the spark plugs (look for signs of wear or fouling).
Install new spark plugs, ensuring the correct gap as per manufacturer specifications.
Reinstall ignition coils and torque to manufacturer specifications.

4. Fuel System Check

Attach the fuel pressure gauge to the fuel rail and turn the ignition to the "On" position (do not start the engine) to check fuel pressure.
If pressure is low, replace the fuel filter and inspect the fuel pump.
Clean or replace fuel injectors as necessary.

5. Inspect Engine Mounts

Visually inspect engine mounts for any visible cracks or wear.
Use a jack to slightly lift the engine and check for excess movement in the mounts.
Replace any damaged engine mounts with new ones, ensuring proper alignment and torque specifications are met.

6. Vacuum Leak Inspection

Use a vacuum gauge to check for proper readings at idle.
Inspect all vacuum hoses and connections for cracks or disconnections.
Replace any damaged hoses, ensuring secure connections.