If the throttle position sensor is out of adjustment, the correct ignition advance angle and air-fuel ratio of the mixture cannot be guaranteed. The throttle position sensor should be accurately adjusted to the specified voltage reading. If the adjustment is too low, knocking will occur during acceleration because the exhaust gas recirculation system does not provide enough exhaust gas in time; Too fast and too much exhaust is provided, reducing power. If the coolant temperature sensor fails, the engine will experience unstable idle speed, misfire, flameout, or increased fuel consumption. A multimeter should be used to detect the resistance value of the coolant sensor at various operating temperatures according to the manufacturer’s regulations.
Solenoid valve failure refers to the valve closing failure controlled by electromagnetic coil pulse. The working quality of the electromagnetic fuel injection valve, the idle speed control solenoid valve, the electromagnetic coil of the ignition device, etc. will directly affect the normal completion of the fuel injection, ignition, idle speed, start-up and other work of the car.