why does my Ford Explorer Fifth Generation (2011-2019) have a carbon buildup problem?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

498 words

Problem Statement

Learn how to diagnose and fix carbon buildup issues 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 engine to cool before opening the intake system.

Symptoms

•Reduced engine performance or power
•Rough idle or stalling
•Increased fuel consumption
•Check engine light illuminated
•Emission test failure
•Ticking or knocking noise from the engine

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for related codes.
2
Perform a visual inspection of the intake manifold and throttle body for signs of carbon deposits.
3
Measure the engine's air-fuel ratio using a wideband O2 sensor to check for deviations.
4
Conduct a compression test to assess engine health.
5
Inspect the PCV (Positive Crankcase Ventilation) system for malfunctions or blockages.
6
Examine fuel injectors for proper spray patterns and functionality.

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
•Torque wrench
•Socket set
•Cleaning brushes
•Vacuum
•Shop towels

Parts Required

•Intake manifold gasket
•Throttle body gasket
•PCV valve (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for related codes.
2
Perform a visual inspection of the intake manifold and throttle body for signs of carbon deposits.
3
Measure the engine's air-fuel ratio using a wideband O2 sensor to check for deviations.
4
Conduct a compression test to assess engine health.
5
Inspect the PCV (Positive Crankcase Ventilation) system for malfunctions or blockages.
6
Examine fuel injectors for proper spray patterns and functionality.

Solution

1. Preparation

Tools Required: OBD-II scanner, torque wrench, socket set, cleaning brushes, vacuum, shop towels.
Disconnect the battery to ensure safety while working on electrical components.
Allow the engine to cool before starting repairs.

2. Remove Intake Manifold

Remove the air intake duct and throttle body.
Unbolt the intake manifold using a socket set and carefully lift it off the engine, taking care not to damage any gaskets or seals.

3. Clean Carbon Deposits

Use a carbon cleaning solution and a soft-bristled brush to scrub the intake ports and manifold.
For severe buildup, consider using a walnut shell blaster or a specialized carbon cleaning tool. Ensure all debris is vacuumed out thoroughly.

4. Inspect and Replace Components

Inspect the throttle body and clean it if necessary.
Check the PCV valve and replace it if clogged or faulty.
Examine fuel injectors for signs of blockage and clean or replace them as needed.

5. Reassemble

Replace any gaskets that were removed or damaged during disassembly.
Reinstall the intake manifold and throttle body, ensuring all bolts are torqued to the manufacturer specifications.
Reconnect the air intake duct and battery.