my Ford Explorer Fifth Generation (2011-2019) has a strong exhaust smell, what could it be?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

565 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 strong exhaust smell in Ford Explorer Fifth Generation (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 exhaust system to cool before inspection or repair to avoid burns.

Symptoms

•Strong odor of exhaust fumes inside or outside the vehicle
•Possible illumination of the check engine light
•Reduced fuel efficiency
•Engine misfires or rough idling
•Increased emissions or visible exhaust smoke

Diagnostic Steps

1
Inspect the exhaust system for visible leaks, particularly at joints, gaskets, and around the catalytic converter.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the exhaust or fuel system.
3
Check for fuel leaks around the fuel injectors, fuel lines, and fuel tank.
4
Inspect the engine oil for signs of fuel dilution, which may indicate a fuel system problem.
5
Test the catalytic converter for proper function using a temperature probe to compare inlet and outlet temperatures.

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
•Flashlight
•Fuel injector cleaner

Parts Required

•Exhaust gaskets
•Exhaust pipes or sections
•Fuel lines or injectors
•Catalytic converter

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Diagnostic Steps

1
Inspect the exhaust system for visible leaks, particularly at joints, gaskets, and around the catalytic converter.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the exhaust or fuel system.
3
Check for fuel leaks around the fuel injectors, fuel lines, and fuel tank.
4
Inspect the engine oil for signs of fuel dilution, which may indicate a fuel system problem.
5
Test the catalytic converter for proper function using a temperature probe to compare inlet and outlet temperatures.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent electrical issues.

2. Inspect and Repair Exhaust System

Inspect for Leaks:
- Use a flashlight to examine the entire exhaust system.
- Look for cracks, holes, or rusted areas.
Repair or Replace Components:
- If a leak is found, use a socket set to remove damaged sections of the exhaust.
- Replace with new components, ensuring all gaskets and seals are intact.
- Torque to manufacturer's specifications (typically around 25-35 lb-ft for exhaust flanges).

3. Address Fuel System Issues

Inspect for Fuel Leaks:
- Check fuel lines and connections for wet spots or signs of leakage.
- Replace any damaged fuel lines or seals.
Clean or Replace Fuel Injectors:
- If injectors are clogged, use a fuel injector cleaner or replace them using appropriate tools.
- Reconnect the fuel line and ensure all connections are secure.

4. Test and Replace Catalytic Converter (if necessary)

Test Functionality:
- If the catalytic converter is suspected to be faulty, perform a temperature test.
- If temperatures are not significantly different, replace the catalytic converter.
Replacement:
- Remove the old catalytic converter using a suitable wrench.
- Install the new catalytic converter, ensuring proper alignment and secure all bolts to the correct torque specifications.