why does my Ford Explorer Fifth Generation (2011-2019) exhaust smell bad

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

576 words

Problem Statement

Learn how to diagnose and fix bad exhaust smell in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repairs.

Affected Component

Exhaust System

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 down before inspecting the exhaust system.

Symptoms

•Strong, foul odor from the exhaust
•Possible presence of black smoke or excessive exhaust fumes
•Engine performance issues, such as rough idle or stalling
•Decreased fuel efficiency
•Check engine light illuminated

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential faults.
2
Inspect the exhaust system for visible damage, leaks, or corrosion.
3
Check the engine oil condition and level for signs of contamination.
4
Examine the fuel system for leaks or improper fuel pressure.
5
Measure exhaust emissions using an emissions tester to check for excessive pollutants.
6
Inspect the catalytic converter for failure or blockage.

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
•Wrench set
•Torque wrench
•O2 sensor socket
•Fuel pressure gauge
•Oil filter wrench
•Oil catch pan

Parts Required

•Catalytic converter (if damaged)
•Oxygen sensors (if faulty)
•Fuel injectors (if leaking or clogged)
•Engine oil and oil filter

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential faults.
2
Inspect the exhaust system for visible damage, leaks, or corrosion.
3
Check the engine oil condition and level for signs of contamination.
4
Examine the fuel system for leaks or improper fuel pressure.
5
Measure exhaust emissions using an emissions tester to check for excessive pollutants.
6
Inspect the catalytic converter for failure or blockage.

Solution

1. Preparation

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

2. Inspect and Replace Components

a. Examine the Catalytic Converter

Tools Required: Wrench set, torque wrench
Check for any signs of damage or excessive heat.
If the catalytic converter is damaged or clogged, remove it.
Sub-steps:
- Remove the bolts securing the catalytic converter to the exhaust system.
- Install a new catalytic converter, ensuring proper alignment.
- Torque bolts to manufacturer specifications.

b. Check and Replace the Oxygen Sensors

Tools Required: O2 sensor socket
Remove the upstream and downstream oxygen sensors if they are faulty.
Sub-steps:
- Disconnect the electrical connector.
- Unscrew the sensors from the exhaust manifold and catalytic converter.
- Install new sensors and connect them properly.

3. Repair or Replace Fuel System Components

Tools Required: Fuel pressure gauge, wrench set
Check the fuel injectors for leaks or clogs.
Sub-steps:
- If necessary, replace faulty injectors.
- Clean injectors using a specialized cleaner if they are clogged.

4. Engine Oil Change

Tools Required: Oil filter wrench, socket set, oil catch pan
Drain old engine oil and replace with new oil to ensure proper engine function.
Sub-steps:
- Remove the oil drain plug and allow old oil to drain completely.
- Replace the oil filter.
- Refill with the recommended type and amount of oil.