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Toyota Sienna Fuel Tank Cap

Toyota Tacoma Gas Cap: Diagnosing the Causes of Failure

Your Toyota Tacoma gas cap protects your fuel from dirt and debris that can contaminate and clog your engine. It also prevents the gasoline from evaporating, so you can enjoy miles of driving. Over time, stress and corrosion can cause your gas cap to malfunction. When this happens, your vehicle may suffer from several problems. Here are some troubleshooting steps that will help you determine what causes your gas cap to break down.

Unusual gas odor

The pervasive smell of gasoline coming from your gas tank is the first symptom that indicates gas cap failure. To verify this, stand in an area not so far from your gas tank. Observe. If you smell a strong stench of gasoline, then you know that your gas cap is either missing or loose. Remove the mounting screws to take the cap out of the vehicle completely. Observe the cap for cracks and holes. If the cap is severely damaged, you must replace it immediately. It's the only way to stop your gasoline from leaking out

The Po44o code

A loose gas cap is very easy to detect with the help of an automotive scan tool. This device provides accurate data readings that point you to the exact defective component in your vehicle. If you're "Check Engine" light is on, get your scan tool and plug it to the port located under your car's dash. The check engine warning can be caused by several things, so you need to do further troubleshooting. After plugging the tool, wait for a few minutes before reading the results of the scan. If the code Po44o is flashing on the tool's screen, it's confirmed that your gas cap is not properly installed.

Poor gas mileage

If you keep on complaining about your Tacoma's extremely poor performance and low fuel mileage, you should check your gas cap immediately. Verify if he cap is still installed in your car. The cap may come off from its mounting if the retaining screws are removed. If the cap is still attached, check if it's loose or not. After that, remove the cap from the fuel port. Observe any hissing sound while you're doing it. The sound indicates that there is still enough pressure in the system. It means that the cap is tightly secured. If no sound is heard, the cap is possibly cracked, hence must be replaced.

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  • Toyota Tacoma Gas Cap: Simple Ways to Make It Last 27 February 2013

    Do you want to know how to make your Toyota Tacoma gas cap last? The secret behind this is very simple. You don't need to spend plenty of cash or your hours of your precious time. Just a quick visual inspection can help you prolong the service life of your gas cap. Yes, that's all. If you're not fully convinced, take note of these easy and hassle-free steps that can certainly add a few years to the cap's service life.


    Clean your cap regularly.

    The benefits of cleaning go beyond seeing your gas cap shiny and dirt-free. It also stops corrosion from spreading onto your cap as well as to the other metal components in your car. To get rid of stubborn dirt, use a product that efficiently removes harmful debris without damaging the metal cap. Try using a petroleum-based lubricant. It's a product that is safe to use on metal car parts. Apply this cleaning agent all over the cap, and leave it for a few minutes. Wipe it off with a rag to take out grime and oil.


    Tighten your cap frequently.

    One of the reasons why a gas cap incurs cracks and dents is extreme mechanical vibration. When the cap is not properly attached to the fuel port, it will bump hard with the other metal components causing punctures and holes. To keep it steady, tighten the cap regularly. Always check if the mounting screws are complete. Replace any missing ones so the cap won't come off from its mounting.


    Keep your cap away from rust.

    Rust is a very destructive element of nature. In your cap, it targets the threads of the gas cap first. When the cap becomes extremely corroded, it can lead to contamination of fuel. That's why you have to detect the signs of corrosion as early as possible. Inspect the gas cap quarterly to keep track of its condition. Apply anti-rust agent to slow down the formation of rust.


    Replace your cap when needed.

    There are times when total cap replacement is better than cap repair. This happens when the cap is extremely old and damaged. If this is the case, don't feel sorry for spending a few cash for a new gas cap. It is the best solution to poor gas mileage and fuel leaks that you are experiencing.