1999 Mercury Tracer Smells Like Gas

Common Causes of Gas Smells in Your 1999 Mercury Tracer and Essential Safety Measures to Take

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Reviewed by
Bo Fader
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 1999 Mercury Tracer 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 Mercury Tracer 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.

What are the steps to diagnose a gas smell in a 1999 Mercury Tracer?

When diagnosing a gas smell in your 1999 Mercury Tracer, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex issues. Start by inspecting the fuel cap, as a loose or damaged cap is a common culprit for gas odors. Next, look for visible leaks under the vehicle, which can indicate problems with the fuel system or lines. If these initial checks do not reveal the source, examine the fuel injector O-rings and fuel lines for any signs of wear or damage, as these components can lead to leaks. Additionally, inspect the fuel tank for punctures or rust, and check the vapor canister for any malfunctions. If you still cannot identify the source of the smell, it may be time to consult a mechanic for a more thorough inspection. This methodical approach not only helps in pinpointing the issue effectively but also ensures that you address the simplest problems first, potentially saving time and money.

What could be causing the gas smell in my 1999 Mercury Tracer?

If you're experiencing a gas smell in your 1999 Mercury Tracer, it's important to investigate the potential causes to ensure your safety and the proper functioning of your vehicle. A fuel leak is often the primary suspect, which can stem from various components such as fuel injectors, fuel lines, or even the fuel tank itself. Additionally, a loose or damaged fuel cap can allow fuel vapors to escape, contributing to the odor. Another area to examine is the evaporative emissions system; issues with parts like the charcoal canister or purge valve can lead to gas smells inside the cabin. Furthermore, consider the exhaust system, as leaks from cracked manifolds or a damaged catalytic converter can sometimes produce a gas-like scent. Lastly, engine problems, particularly those that cause the engine to run too rich, can result in an excess of fuel in the air-fuel mixture, leading to a noticeable gas smell. It's crucial to address these issues promptly, and if you're unable to identify the source of the smell, seeking assistance from a qualified mechanic is advisable to prevent any potential hazards.

How urgent is it to address the gas smell in my 1999 Mercury Tracer?

Addressing a gas smell in your 1999 Mercury Tracer is not just a minor inconvenience; it is a pressing safety concern that requires immediate attention. Ignoring this issue can lead to severe consequences, including the risk of fire due to gasoline leaks, which can ignite from even the smallest spark. Additionally, the health implications of inhaling gasoline fumes are significant, as they can cause dizziness, headaches, and nausea, posing a threat to your well-being and that of your passengers. Furthermore, gasoline leaks can have detrimental effects on the environment, potentially contaminating soil and water sources. Therefore, it is essential to act swiftly and investigate the source of the gas smell to mitigate these risks and ensure a safe driving experience.

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Why Your 1999 Mercury Tracer Smells Like Gas | RepairPal