Why does the Wuling Zhiguang fail to start but works fine after a while?
2 Answers
The reason for this situation is insufficient fuel pressure. Here is the relevant introduction about fuel pressure: 1. Detection method: Turn on the ignition switch (without starting the engine) to make the electric fuel pump operate. The fuel pressure at this time should meet the technical requirements, generally fluctuating around 0.3MPa. 2. Fuel pressure regulator: The fuel pressure is coordinated by the spring and the vacuum degree of the air chamber. When the fuel pressure exceeds the standard value, the high-pressure fuel will push the diaphragm upward, the ball valve opens, and the excess fuel will flow back to the fuel tank through the return pipe. When the pressure is lower than the standard value, the spring presses the diaphragm downward to close the ball valve and stop the return flow. The function of the pressure regulator is to keep the pressure in the fuel circuit constant.
My Wuling Sunshine also had the issue of not starting, then working fine after a few minutes. It’s mostly caused by loose battery connections or insufficient battery power, especially during cold winter starts when battery performance drops significantly. I recall a similar situation last time—after checking, I found the terminal connections were dirty, leading to poor contact and insufficient voltage, which prevented the starter from turning. It only started after waiting for the temperature to rise or a slight vibration reconnected it. I recommend using a wrench to tighten the battery terminals. If the voltage measures below 11 volts, you’ll need to charge or replace the battery. Additionally, a faulty starter motor could also cause this, though it’s less common. Don’t delay too long to avoid being stranded on the road. If simple checks don’t solve it, quickly consult a professional mechanic—don’t skimp on safety for the sake of saving a little money.
