2001 Mitsubishi Montero Sport Smells Like Gas

Diagnosing Fuel Odor Issues in Your 2001 Mitsubishi Montero Sport and Essential Safety Measures

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
15% chance it's the
Gas Cap
0%
40% chance it's the
Emissions Control System
0%
45% chance it's
Something else
The most common reasons a 2001 Mitsubishi Montero Sport smells like gas are the gas cap, the fuel system, or the emissions control system.
  • Gas Cap: A loose or damaged gas cap can cause fuel vapors to escape, triggering the check engine light and potentially affecting fuel system pressure.
  • Emissions Control System: A faulty emissions control system can lead to increased hydrocarbon emissions and trigger the check engine light due to malfunctioning components like the EGR valve or O2 sensors.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2001 Mitsubishi Montero Sport smells like gas?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

A failing catalytic converter can cause a vehicle to fail emissions tests and turn on the check engine light. The exhaust might have an unusual smell. A restricted catalytic converter can result in a loss of engine power.

» LEARN MORE: How to tell if your catalytic converter is failing

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. The canister may also cause difficulty starting the engine, a rough idle, and poor fuel mileage.

When the fuel filter begins to clog, the engine suffers from fuel starvation. This will cause a significant reduction in power and may also cause a misfire. These conditions may be intermittent, or constant and worsen over time. As the issue progresses, the engine may being to stall immediately after starting, fail to start, hesitate under throttle, or stall at particular angles on hills.

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. A fuel tank leak may also cause difficulty starting the engine, a rough idle, and poor fuel mileage. When a fuel tank is simply corroded to the point of failure, the exterior tank condition rarely shows damage. The inside of the fuel tank will be rusted or corroded, and rust flakes or other debris may be floating in the fuel.

For most vehicles, the only symptom will be a check engine light or fuel tank filler cap light illuminating on the driver instrument cluster. This is to signal that there is an evaporative emissions (EVAP) leak. In some situations, the vehicle may take longer than normal to start, or, more rarely, the engine may not start at all. on-board diagnostic (OBD) trouble codes will refer to EVAP system failures such as a small or massive EVAP system leak. Lastly, the powertrain control module may notice a lean running condition, which could even lead to random and infrequent misfires.

What are the initial diagnostic steps to take for a gas smell in a 2001 Mitsubishi Montero Sport?

When confronted with a gas smell in your 2001 Mitsubishi Montero Sport, it's crucial to adopt a systematic diagnostic approach to identify the source of the issue. Start by visually inspecting the area around your vehicle for any signs of gasoline leaks, such as puddles or wet spots, which can help you quickly locate the problem. Next, turn your attention to the fuel lines and connections under the hood; look for any signs of damage or loose fittings, and ensure that all connections are secure. Don’t overlook the fuel tank itself—check for cracks, holes, or rust that could be contributing to the odor. Additionally, inspect the fuel injector O-rings, as worn or damaged O-rings can lead to fuel leaks. If you suspect issues with the evaporative emissions control system, examine it for any leaks or malfunctions, as this system plays a vital role in managing fuel vapors. Lastly, consider the condition of the fuel filter; a clogged or damaged filter can also produce fuel odors, so inspect and replace it if necessary. By following these steps, you can effectively diagnose and address the gas smell in your Montero Sport, ensuring a safer driving experience.

What could be causing the gas smell in my 2001 Mitsubishi Montero Sport?

If you're detecting a gas smell in your 2001 Mitsubishi Montero Sport, it's crucial to understand the common problems that could be at play. One of the primary culprits is a fuel leak, which can occur anywhere in the fuel system, from the fuel lines to the injectors, and poses a significant safety risk. Inspecting the fuel lines for any signs of wear or damage is a good starting point. Another potential issue could be a faulty fuel injector, which may not seal properly, allowing fuel to escape and create an odor. Additionally, check the fuel tank for any cracks or holes, as damage here can lead to fuel vapors escaping into the cabin. A loose or damaged fuel cap is often overlooked but can also be a simple fix that prevents fuel vapors from leaking. Lastly, consider the evaporative emission control system (EVAP), which is designed to capture fuel vapors; any malfunction in this system can result in a noticeable gas smell. Addressing these issues promptly is essential not only for your vehicle's performance but also for your safety on the road.

How urgent is it to address the gas smell in my 2001 Mitsubishi Montero Sport?

Addressing a gas smell in your 2001 Mitsubishi Montero Sport is not just a matter of inconvenience; it is a pressing safety concern that requires immediate action. Gas leaks can lead to catastrophic outcomes, including the risk of fire, which endangers not only your life but also the lives of others nearby. Moreover, the inhalation of gas fumes poses serious health risks, manifesting in symptoms such as dizziness, nausea, and headaches that can impair your ability to drive safely. Beyond the immediate dangers, neglecting a gas smell can result in further damage to your vehicle, leading to more extensive and costly repairs down the line. Therefore, it is imperative to take any gas odor seriously and seek professional assistance to diagnose and resolve the issue promptly, ensuring both your safety and the longevity of your vehicle.

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