1991 Mitsubishi Precis Smells Like Gas

Addressing Gas Smells in Your 1991 Mitsubishi Precis and 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 1991 Mitsubishi Precis 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 1991 Mitsubishi Precis 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.

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.

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 my 1991 Mitsubishi Precis to smell like gas, and how should I diagnose it?

When diagnosing a gas smell in your 1991 Mitsubishi Precis, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex issues. Start by inspecting the fuel system for any visible leaks, focusing on the fuel lines, tank, and injectors, as even minor leaks can produce a strong odor. Next, examine the fuel injector O-rings for wear or damage, as compromised O-rings can lead to fuel escaping and contributing to the smell. Additionally, check the fuel filter; a clogged filter may not only restrict fuel flow but can also cause fuel to leak or evaporate, resulting in a noticeable gas odor. If your vehicle has a carburetor, inspect it for issues like a stuck float or leaking gaskets, which can also lead to gas smells. Furthermore, assess the evaporative emissions control system, ensuring that components like the charcoal canister and purge valve are functioning correctly, as failures here can allow gas vapors to escape. If these steps do not reveal the source of the problem, or if you feel uncomfortable performing these checks, it’s wise to consult a professional mechanic who can provide a thorough inspection and accurate diagnosis. By following this structured approach, you can effectively identify and address the cause of the gas smell in your Mitsubishi Precis.

What could be causing a gas smell in a 1991 Mitsubishi Precis?

If you're detecting a gas smell in your 1991 Mitsubishi Precis, it's crucial to identify the underlying cause to ensure your safety and the vehicle's functionality. One common issue could be a leaking fuel injector, which can emit gas vapors, creating a noticeable odor both inside and outside the car. Additionally, inspect the fuel lines for any signs of damage or wear, as deteriorating lines can lead to leaks and a strong gas smell. Don't overlook the gas cap; a loose or damaged cap can allow fuel vapors to escape, contributing to the odor. Furthermore, check for any leaks in the fuel tank itself, as this can also be a significant source of gas smells. Lastly, consider the condition of the Evaporative Emissions Control System (EVAP), as malfunctioning components like the charcoal canister or purge valve can lead to gas odors. Addressing these issues promptly is essential, and while some DIY checks can be performed, consulting a qualified mechanic for a thorough inspection is highly recommended to ensure your vehicle remains safe and reliable.

How urgent is it to address a gas smell in a 1991 Mitsubishi Precis?

Addressing a gas smell in your 1991 Mitsubishi Precis is not just a matter of convenience; it is a pressing safety issue that requires immediate attention. Ignoring the smell can lead to severe consequences, including the risk of fire due to the flammable nature of gasoline. Additionally, prolonged exposure to gasoline fumes poses significant health risks, such as respiratory problems and neurological effects, which can affect your well-being and that of others around you. Furthermore, a gas leak can have detrimental effects on the environment, potentially contaminating local soil and water sources. Therefore, it is crucial to act swiftly and have your vehicle inspected by a qualified mechanic to identify and rectify the source of the gas smell, ensuring your safety and the safety of those around you.

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1991 Mitsubishi Precis Gas Smell: Causes & Solutions