What to Do When a Natural Gas Vehicle Frequently Switches to Gasoline?
3 Answers
Here are the reasons why a natural gas vehicle frequently switches to gasoline: 1. High-voltage wire leakage. 2. Switch signal wire is not connected. 3. Switch is faulty, wiring is damaged, or there is a software issue. Additional information: 1. Natural Gas Vehicle: A natural gas vehicle is a car that uses natural gas as fuel to provide power. Natural gas has a methane content of over 90%, making it an excellent fuel for car engines. Natural gas vehicles have been promoted and applied worldwide. 2. Operating Principle of Natural Gas Vehicles: When the engine of a natural gas vehicle starts, natural gas flows from the gas cylinder through a hose into the fuel system. Near the engine, the natural gas enters a pressure regulator to achieve pressure reduction.
I've been driving a natural gas vehicle for almost ten years, and the frequent fuel switching is really annoying. This issue usually occurs when the gas pressure is insufficient, causing the system to automatically switch back to gasoline. Common causes include a clogged gas filter or faulty sensors like the pressure sensor. Last winter, I experienced frequent fuel switching during cold starts. After inspection, I found a loose pipe connection causing a gas leak. I temporarily fixed it with some tape, but a permanent solution requires replacing the part. Additionally, poor gas quality or impurities mixed in during refueling can easily trigger the issue, leading the ECU to misjudge and switch fuels. I recommend doing a simple check yourself for loose pipe connections and feeling for any gas leaks. Low battery voltage can sometimes interfere with the system too. However, if the problem persists, make sure to visit a 4S shop as soon as possible for professional diagnostics. Don't delay, as it could affect driving safety or damage other components. Remember, regular maintenance of the filter can effectively prevent such issues, saving you both money and hassle.
Using CNG vehicles is originally meant to save fuel costs and be environmentally friendly, but frequent fuel switching defeats the purpose. Once when I was driving on the highway, the frequent switching drove me crazy. After researching later, I found out it was a minor fault in the gas supply system, such as an aging gas pump or clogged intake, causing pressure fluctuations that mistakenly switched the system to gasoline mode. The solution is simple: first try restarting the vehicle or pressing the mode switch button, which might temporarily fix the issue. But if it keeps happening, chances are you need to check the sensors and wiring harness, and replace worn parts. From my personal experience, it's best not to tinker with it yourself—professional repair shops can fix it within an hour after scanning, and spending a few hundred bucks is worth it. Choosing reliable gas stations to avoid impurities when refueling can also reduce problems. Overall, regular maintenance is key.
