What are the effects of a damaged fuel pressure sensor on a vehicle?
3 Answers
If the fuel pressure sensor is damaged, it cannot detect the fuel pressure, and the engine computer cannot adjust the fuel pressure according to the operating conditions. As a result, symptoms such as weak acceleration and difficulty starting may occur. Here is additional information: 1. Working Principle: The fuel pressure sensor is a spring-actuated valve that can return excess gasoline to the fuel tank to maintain relatively stable pressure in the fuel line. The fuel pressure sensor has a vacuum tube connected to the intake manifold, providing different gasoline pressures to the engine under various operating conditions, i.e., determining the engine load based on vacuum levels. 2. Solution: Once the fuel pressure sensor is damaged, it is essential to visit a 4S shop or a repair facility for inspection and repair as soon as possible.
I once drove an older car where the fuel pressure sensor failed. Starting the engine became extremely difficult, as if someone was choking it. Acceleration was noticeably sluggish, and the car felt very sluggish. Fuel consumption suddenly skyrocketed—originally using 7 liters per 100 kilometers, it jumped to over 9 liters, requiring frequent trips to the gas station. The exhaust also emitted an unpleasant odor. The most annoying part was that the car often stalled at traffic lights, making me slow off the mark when starting. This sensor monitors fuel pressure, and once it fails, the computer misjudges the fuel amount, leading to uneven air-fuel mixture. Over time, it can also damage the fuel injectors. I delayed repairs for a month, wasting a lot of fuel money and effort. I advise car owners to pay attention to the warning lights and get it checked at the first sign of trouble—don’t be as careless as I was.
I know a thing or two about car fuel systems. If the fuel pressure sensor is damaged, the primary impact is on engine performance. It's responsible for measuring fuel supply pressure and transmitting that information to the engine control unit. If the data is inaccurate, the system will incorrectly command the fuel pump to inject more or less fuel, resulting in either too lean or too rich fuel mixture. Consequences include difficulty starting, unstable idle vibration, sluggish acceleration when stepping on the gas pedal, as well as significantly increased fuel consumption and emission pollution. Additionally, the check engine light stays on constantly, fuel injectors may get damaged, and prolonged neglect can affect other components like oxygen sensors, making repairs more troublesome. My own car had similar issues, and after replacing the sensor, everything returned to normal - saving both money and hassle.
