1999 Ford Explorer Smells Like Gas

Common Causes of Gas Smells in Your 1999 Ford Explorer and Essential Safety Measures to Take

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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
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40% chance it's the
Emissions Control System
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45% chance it's
Something else
The most common reasons a 1999 Ford Explorer 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 1999 Ford Explorer 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 could be causing the gas smell in my 1999 Ford Explorer?

When dealing with a gas smell in your 1999 Ford Explorer, it's essential to start with the most straightforward checks before moving on to more complex diagnostics. Begin by inspecting the fuel cap; a loose or damaged cap is a common and easily fixable source of gas odors. Next, examine the fuel filler neck and the evap tube for any visible signs of wear, rust, or holes, as these can lead to fuel vapors escaping into the cabin. If the smell persists, consider checking for leaks in the fuel system, which may require a more thorough inspection of the fuel lines and connections. Additionally, keep an eye on the catalytic converter, as a failing unit can also contribute to unusual odors. Remember, while some issues can be addressed at home, safety is paramount, so if you encounter anything beyond your expertise, consulting a qualified mechanic is advisable to ensure your vehicle is safe to drive.

What are the common causes of a gas smell in a 1999 Ford Explorer?

When dealing with a gas smell in your 1999 Ford Explorer, it's crucial to identify the common problems that could be causing this issue. One of the first things to check is the gas cap; a loose or damaged cap can easily lead to fuel vapors escaping, creating a noticeable odor. If the gas cap appears secure, the next area to investigate is the fuel system itself, as leaks in the fuel lines or connections are frequent culprits in older vehicles. Additionally, consider the emissions control system, particularly the catalytic converter, which can malfunction and emit gas odors if it is failing. Other potential sources include issues with the ignition system or the mass airflow (MAF) sensor, both of which can affect fuel combustion and lead to an unpleasant smell. Addressing these problems promptly is essential not only for your vehicle's performance but also for your safety, as gasoline fumes can be hazardous. If you're unable to pinpoint the source of the smell, consulting a qualified mechanic is advisable to ensure a thorough inspection and resolution of the issue.

How urgent is it to address the gas smell in my 1999 Ford Explorer?

Addressing a gas smell in your 1999 Ford Explorer is not just a matter of convenience; it is a critical safety issue that demands immediate attention. Gas leaks can lead to dangerous fire hazards, putting both you and others at risk. Moreover, inhaling gas fumes can have serious health implications, including dizziness and nausea, which can impair your ability to drive safely. Beyond safety concerns, neglecting this issue can result in decreased fuel efficiency and potential engine damage, leading to costly repairs down the line. Therefore, if you detect a gas smell, it is essential to investigate the source promptly. Start by checking for visible leaks around the fuel lines and connections, and consider inspecting the fuel tank for any signs of corrosion or damage. Taking these steps not only protects your health and safety but also helps maintain the longevity and performance of your vehicle.

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1999 Ford Explorer Smells Like Gas: Causes & Repairs