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
When diagnosing a gas smell in your 2000 Mitsubishi Diamante, it's crucial to take a methodical approach that begins with the simplest checks. Start by looking under your vehicle for any visible signs of fuel leaks, such as dripping gasoline or wet spots around the fuel tank and fuel lines. Next, ensure that the fuel cap is tightly sealed, as a loose or damaged cap can easily allow gas odors to escape. After that, inspect the fuel lines for any cracks, holes, or loose connections, as these are common sources of leaks. It's also important to check the fuel injectors to ensure they are functioning properly, since faulty injectors can lead to gas leakage. Additionally, examine the fuel tank for any signs of damage or corrosion, which could contribute to the smell. If these initial checks do not reveal the source of the odor, consider visiting a mechanic who can conduct a more thorough inspection with specialized tools. By following this structured diagnostic approach, you can effectively identify and resolve the gas smell issue in your vehicle.
If your 2000 Mitsubishi Diamante is emitting a gas smell, several common problems could be at play. One of the primary culprits is a leaking fuel injector, which can release fuel vapors into the engine compartment and cabin, creating a strong odor. Additionally, faulty fuel lines may develop cracks or leaks over time, allowing gasoline to escape and contribute to the smell. Another frequent issue is a gas cap that is loose, damaged, or missing; ensuring that the cap is securely fastened after refueling can help mitigate this problem. Furthermore, a leak in the fuel tank itself, whether from damage or corrosion, can also be a significant source of gas odors. Lastly, problems with the evaporative emissions system, which is designed to capture and recycle fuel vapors, can lead to unwanted smells if components fail. For DIY enthusiasts, it’s crucial to inspect these areas carefully, as addressing these issues promptly not only enhances safety but also improves the overall performance of your vehicle.
Addressing a gas smell in your 2000 Mitsubishi Diamante is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Gas leaks can lead to dangerous fire hazards, putting both you and your vehicle at risk. Moreover, the inhalation of gas fumes poses serious health risks, including dizziness, headaches, and nausea, which can impair your ability to drive safely. Ignoring this issue can also result in further damage to your car's fuel system, leading to costly repairs that could have been avoided with timely intervention. Therefore, if you detect a gas smell, it is essential to investigate the source immediately. Start by checking for visible leaks around the fuel lines and connections, and consider consulting a repair manual for your vehicle to guide you through the inspection process. Taking these steps not only ensures your safety but also helps maintain the integrity of your Mitsubishi Diamante, preventing more significant issues down the line.

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.
See what others are asking about their Mitsubishi Diamante. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Mitsubishi Diamante drivers like you.