how to fix rough running engine on Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

591 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 a rough running engine in Ford Explorer (2011-2019). 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 performing any maintenance.

Symptoms

•Rough idle when the engine is at a standstill
•Engine stalling during acceleration
•Decreased fuel efficiency
•Check engine light illuminated
•Misfiring or hesitation during acceleration
•Unusual vibrations through the chassis

Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes using an OBD-II scanner.
2
Inspect the spark plugs and ignition coils for wear or damage.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning correctly.
4
Inspect the air filter for clogs or restrictions that could affect airflow.
5
Examine vacuum lines for leaks that could lead to an improper air-fuel mixture.
6
Perform a visual inspection of the throttle body for carbon buildup or obstructions.

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
•Spark plug socket
•Fuel pressure gauge
•Screwdriver

Parts Required

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

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Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes using an OBD-II scanner.
2
Inspect the spark plugs and ignition coils for wear or damage.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning correctly.
4
Inspect the air filter for clogs or restrictions that could affect airflow.
5
Examine vacuum lines for leaks that could lead to an improper air-fuel mixture.
6
Perform a visual inspection of the throttle body for carbon buildup or obstructions.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the negative battery cable to prevent electrical shorts.

2. Replace Spark Plugs and Ignition Coils

Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
Remove the engine cover if necessary.
Disconnect the electrical connectors from the ignition coils.
Remove the ignition coils by unscrewing them from the valve cover.
Use a spark plug socket to remove old spark plugs.
Inspect the new spark plugs, apply dielectric grease to the terminals, and install them to the specified torque (usually 12-15 lb-ft).
Reinstall the ignition coils and reconnect the electrical connectors.

3. Clean or Replace Air Filter

Tools Required: Screwdriver (if necessary for clamps).
Remove the air filter housing cover by loosening any clamps or screws.
Take out the air filter and inspect it for dirt or damage.
Clean the air filter if reusable or replace it with a new one.
Reassemble the air filter housing.

4. Check and Repair Vacuum Leaks

Tools Required: Hose clamps, replacement hoses if needed.
Visually inspect all vacuum hoses for cracks or disconnections.
Replace any damaged hoses and secure them with hose clamps.

5. Fuel System Inspection

Tools Required: Fuel pressure gauge, safety glasses, rags.
Connect the fuel pressure gauge to the fuel rail according to the manufacturer's instructions.
Start the engine and check the fuel pressure against the specifications (generally around 30-60 psi for Ford).
If pressure is low, check the fuel filter and replace if clogged; if necessary, replace the fuel pump.