Fuel pressure sensor b circuit high solution:
There is a pressure chamber in the fuel pressure regulator, and there is a diaphragm with an overflow valve in the chamber. The vacuum chamber is on the inside of the diaphragm, and there is a spring in the chamber. The pressure difference caused by the pressure of the fuel system and the vacuum degree of the intake pipe and the spring spring jointly act on the diaphragm.
When the pressure difference between the pressure of the fuel system and the vacuum degree of the intake pipe is lower than the spring elasticity, the relief valve is closed; When the pressure difference between the pressure of the fuel system and the vacuum degree of the intake pipe is higher than the spring spring, the relief valve opens and the excess fuel flows back to the fuel tank through the return pipe. In this way, the pressure of the fuel system can be adjusted to maintain a constant oil supply pressure of the injector (about 180 ~ 320kpa).
1. Charge the battery and remove it, stand with a multimeter to measure the battery voltage, and then measure the voltage two days later, if the difference is very big, there may be damage inside the battery, there is electrolyte outflow, the power will slowly reduce.
2. Check whether there is a problem with your circuit, such as short circuit or wrong connection may cause