why does my Toyota Corolla E170 (2013-2019) exhaust smell like gas

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

531 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 the gasoline smell from the exhaust in your 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before opening any components.

Symptoms

•Strong gasoline odor from the exhaust
•Poor fuel economy
•Engine misfiring or rough idle
•Check engine light illuminated
•Excessive black smoke from the exhaust
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fuel system-related codes.
2
Check for fuel leaks in the fuel lines, fuel injectors, and connections.
3
Inspect the air filter and intake system for blockages or damage.
4
Test the fuel pressure using a fuel pressure gauge to ensure it is within specifications.
5
Examine the spark plugs for fouling or excessive carbon buildup.
6
Verify the operation of the engine coolant temperature sensor.

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
•Fuel pressure gauge
•Socket set
•Multimeter
•Safety goggles
•Gloves

Parts Required

•Fuel lines or seals (if damaged)
•Fuel injectors (if leaking)
•Spark plugs
•Air filter
•Engine coolant temperature sensor (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fuel system-related codes.
2
Check for fuel leaks in the fuel lines, fuel injectors, and connections.
3
Inspect the air filter and intake system for blockages or damage.
4
Test the fuel pressure using a fuel pressure gauge to ensure it is within specifications.
5
Examine the spark plugs for fouling or excessive carbon buildup.
6
Verify the operation of the engine coolant temperature sensor.

Solution

1. Preparation

Tools Required: OBD-II scanner, fuel pressure gauge, socket set, multimeter, safety goggles, gloves.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent electrical shorts during repairs.

2. Inspect and Repair Fuel Leaks

Sub-steps:
1. Visually inspect all fuel lines and connections for signs of leakage.
2. Replace any damaged or leaking fuel lines or seals.
3. Check fuel injectors for leaks and replace defective injectors as needed.

3. Test and Adjust Air-Fuel Mixture

Sub-steps:
1. Use the OBD-II scanner to check the air-fuel ratio readings.
2. If readings indicate a lean condition, inspect the intake system for leaks.
3. Clean or replace the air filter to ensure proper airflow to the engine.

4. Replace Spark Plugs

Sub-steps:
1. Remove the spark plug wires and unscrew the spark plugs using a socket wrench.
2. Inspect the spark plugs for fouling or excessive carbon deposits.
3. Replace with new spark plugs, ensuring they are correctly gapped according to manufacturer specifications.

5. Verify Engine Coolant Temperature Sensor

Sub-steps:
1. Locate the coolant temperature sensor and use a multimeter to test its resistance.
2. Compare the readings to the specifications in the service manual.
3. Replace the sensor if it is outside of the specified range.