why does my Ford Explorer Fifth Generation (2011-2019) have a strong exhaust smell

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

573 words

Problem Statement

Learn how to diagnose and fix a strong exhaust smell in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Exhaust System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before inspecting the exhaust system.

Symptoms

•Strong odor of exhaust fumes in the cabin or outside the vehicle
•Reduced fuel efficiency
•Check engine light illuminated
•Engine misfire or rough running
•Unusual smoke from the exhaust

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential engine management issues.
2
Inspect the exhaust system for visible leaks, cracks, or damage, particularly around the manifold, catalytic converter, and muffler.
3
Check for any signs of engine oil or coolant leaking into the combustion chamber.
4
Inspect the air-fuel mixture using a fuel pressure gauge and ensure it’s within factory specifications.
5
Examine the condition of the spark plugs and ignition coils for signs of wear or failure.

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
•Safety glasses
•Fuel pressure gauge

Parts Required

•Exhaust pipe or gasket (if damaged)
•Spark plugs
•Ignition coils (if faulty)
•Fuel filter (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential engine management issues.
2
Inspect the exhaust system for visible leaks, cracks, or damage, particularly around the manifold, catalytic converter, and muffler.
3
Check for any signs of engine oil or coolant leaking into the combustion chamber.
4
Inspect the air-fuel mixture using a fuel pressure gauge and ensure it’s within factory specifications.
5
Examine the condition of the spark plugs and ignition coils for signs of wear or failure.

Solution

1. Preparation

Gather tools and materials such as an OBD-II scanner, socket set, torque wrench, and safety glasses.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Exhaust Leaks

Inspect and Locate Leaks:
- Start the engine and visually inspect the exhaust system for leaks while listening for hissing sounds.
Repair or Replace Damaged Components:
- If a leak is found, use a wrench to loosen and remove the damaged section.
- Replace with a new section of pipe or gasket as required. Ensure proper alignment.
Reassemble:
- Torque bolts to the manufacturer's specifications (usually between 20-30 ft-lbs for exhaust components).

3. Check and Replace Spark Plugs

Remove Ignition Coils:
- Disconnect the battery. Remove the ignition coils using a socket set.
Replace Spark Plugs:
- Use a spark plug socket to remove old spark plugs. Install new spark plugs to the specified gap (usually 0.044 inches).
- Torque new spark plugs to the manufacturer’s specifications (typically around 13-15 ft-lbs).
Reinstall Ignition Coils:
- Reconnect the ignition coils and battery.

4. Inspect and Adjust Air-Fuel Mixture

Check Fuel Pressure:
- Connect a fuel pressure gauge to the fuel rail and compare the reading to manufacturer specifications.
Replace Fuel Filter:
- If pressure is low, replace the fuel filter following manufacturer guidelines.
Adjust Fuel Mixture:
- If applicable, use the OBD-II scanner to adjust the air-fuel mixture settings through the engine management system.