Why can't the BYD F3 accelerate in hot weather?

[SanEmery]

BYD F3's inability to accelerate in hot weather may be due to reaching the fuel limit point, and the engine water temperature may be abnormal. It is recommended to go to a 4S store for inspection. When the engine is working at high temperatures and reaches a certain high water temperature (generally 105 degrees Celsius for gasoline engines), the engine control module will issue a fuel limit command to the engine fuel injection system, and no longer increase the fuel injection to the engine. At this time, no matter how much the accelerator pedal is pressed, the fuel injection amount will not increase, and the engine power will not increase either. The following is an introduction to the BYD brand: 1. Brand History: BYD Company Limited was founded in 1995, starting with a scale of more than 20 people. By 2003, it had grown into the world's second-largest rechargeable battery manufacturer and established BYD Auto in the same year. Within just one year, BYD Auto's product line expanded rapidly from the original single "Flyer" mini car to a full range of products including A-class fuel vehicles, C-class fuel sedans, lithium-ion electric vehicles, and hybrid vehicles. 2. Brand Introduction: BYD Auto follows the development path of independent research and development, independent production, and independent brand, aiming to create truly affordable and high-quality vehicles for the people. The product design not only draws on advanced international trends but also conforms to the aesthetic concepts of Chinese culture.

[DelDelilah]

I've been driving a BYD F3 for almost ten years, and it's not uncommon to experience lack of power when refueling in hot weather. The most common issue is excessive gasoline evaporation in the fuel lines due to heat, causing the fuel pump to struggle with oil suction and resulting in reduced engine power. When the engine overheats, the electronic control unit automatically reduces power to protect internal components, leading to sluggish acceleration. Thin air causing incomplete combustion also contributes to the problem—like last week when I was driving uphill in the heat and pressing the gas pedal with no response for a while, which was really frustrating. It's recommended to regularly check the coolant level and radiator fan to ensure the cooling system works properly. Clean throttle valve carbon deposits to improve airflow, keep the fuel filter unclogged, and use high-quality gasoline to minimize evaporation issues. If this happens frequently, it might be due to worn spark plugs or a dirty oxygen sensor, requiring professional inspection. A full maintenance check before summer is highly effective—I personally experienced significant improvement after replacing some parts. Drive safely and don't push your car too hard.

[DeSawyer]

As a frequent DIY car repair enthusiast, I've encountered the issue of BYD F3 struggling to accelerate on hot days multiple times, mainly due to vapor lock - fuel turning into bubbles in the hot fuel line, blocking the fuel path and causing insufficient fuel pump pressure leading to slow fuel delivery. When dealing with this, I've found relief by checking the fuel tank ventilation system or installing heat insulation kits. High intake air temperature reducing air density can also cause engine power loss, making cleaning or replacing the air filter crucial. Overheated fuel pump failures are also common, and upgrading to high-temperature resistant components is cost-effective. Large spark plug gaps or weak ignition coils can worsen the problem - I used an OBD scanner to read error codes and discovered oxygen sensor false alarms. For summer maintenance, I recommend avoiding parking in direct sunlight, monitoring the coolant temperature gauge regularly, changing engine oil and maintaining the cooling system periodically. Always consult the manual or search for DIY tutorials before starting repairs to prevent mistakes.

[VonLandon]

When I first got my driver's license and drove a BYD F3, I also encountered lack of power during acceleration on hot days. Simply put, in hot weather, the thin air leads to an overly lean air-fuel mixture, resulting in poor combustion and power output blockage. Check the fuel pump pressure and ensure there are no fuel leaks in the fuel lines. The engine's overheating protection mechanism will automatically limit speed to allow the engine to cool down a bit. It's recommended to clean the throttle body to ensure smooth air intake and avoid using low-quality gasoline to reduce evaporation. Regular maintenance, such as replacing filters, is essential. If the water temperature gets too high, stop and let the car rest, then try restarting it. The operations aren't difficult, but don't delay to prevent small issues from turning into major faults.