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Home/Cars/Honda/Pilot/Third Generation (2016-present)/why does my Honda Pilot's exhaust smell bad

why does my Honda Pilot's exhaust smell bad

Honda Pilot Third Generation (2016-present)

Severity: mediumDifficulty: medium2-4 hours
3 min read
581 words

Problem Statement

Learn how to diagnose and fix bad exhaust smell in Honda Pilot. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Component
Exhaust System
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening any components of the exhaust system.

Symptoms

  • •Unpleasant odor from the exhaust, possibly resembling sulfur or rotten eggs
  • •Check engine light illuminated
  • •Decreased fuel efficiency
  • •Engine misfiring or rough idling
  • •Increased emissions or visible smoke from the exhaust

Diagnostic Steps

  1. 1Scan the vehicle's computer for error codes using an OBD-II scanner to identify any relevant trouble codes.
  2. 2Inspect the exhaust system for visible signs of damage, leaks, or rust.
  3. 3Check the engine oil level and condition to ensure it is not contaminated or excessively low.
  4. 4Test the catalytic converter's functionality using a temperature probe to measure inlet and outlet temperatures.
  5. 5Examine the fuel system for signs of improper fuel mixture or fuel leaks.
  6. 6Assess the condition of the spark plugs and ignition system for wear or failure.

Solution

Solution

1. Preparation

  • Gather tools and parts needed for repairs.
  • Ensure the vehicle is parked on a level surface and set the parking brake.
  • Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace the Catalytic Converter (if faulty)

  • Sub-steps:
    1. Raise the vehicle using a jack and secure it with jack stands.
    2. Locate the catalytic converter on the exhaust system.
    3. Remove the bolts securing the catalytic converter using a socket set.
    4. Carefully detach the catalytic converter from the exhaust pipe.
    5. Inspect the old catalytic converter for signs of clogging or damage.
    6. Install the new catalytic converter, making sure to align it properly and torque bolts to the manufacturer’s specifications (typically around 25-35 lb-ft).

3. Clean or Replace Spark Plugs

  • Sub-steps:
    1. Remove the ignition coil(s) or plug wires from the spark plugs.
    2. Use a socket wrench to remove the spark plugs.
    3. Inspect the spark plugs for wear; replace if necessary.
    4. Clean the spark plug holes and apply anti-seize compound to the threads of new plugs.
    5. Install the new spark plugs, tightening them to the manufacturer’s specification (usually around 13-18 lb-ft).

4. Fuel System Inspection

  • Sub-steps:
    1. Locate the fuel filter and fuel injectors.
    2. Inspect for leaks and replace the fuel filter if it is clogged.
    3. Use a fuel injector cleaner additive to help with any clogging in the injectors.
    4. Ensure that the fuel pressure is within specifications using a fuel pressure gauge.

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
  • Fuel pressure gauge
  • Jack and jack stands

Parts Required

  • Catalytic converter (if faulty)
  • Spark plugs
  • Fuel filter (if necessary)

Additional Information

Component

Exhaust System

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

3 items

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