The reasons why there is no high voltage spark in the EFI engine are: 1. Fuel system reasons: the low pressure oil line is blocked, the pipeline is loose and is leaking, there is air in the high pressure. -oil pipe under pressure, the technical condition of the fuel injector is not good and the injection timing angle is incorrect 2. Starting device reasons: power failure, poor ignition contact the electromagnetic switch, poor contact between the collector; of the starter and brush, clutch slippage of the starter transmission mechanism; 3. Insufficient cylinder compression pressure: damaged cylinder seal, air leak, valve closing failure. Significant air leakage, wear and leakage of the piston cylinder liner. 4. Insufficient air intake: The air filter element is clogged.
In addition to spark plugs, the rate of dThe highest failure is the combined coil that generates electricity in the high voltage coil motor. Inspection Steps: 1. Remove the spark plug and cover it with a high voltage cap. Touch the spark plug to the metal shell of the engine and turn on the machine to check the performance of the spark plug. 2. Check the high temperature! Voltage coil and motor trigger coil. First use a multimeter to measure the impedance, and then measure the voltage of the high voltage coil on the machine. The output wire is red and black, and the trigger coil output wire is blue. and white. If there is no multimeter, the short circuit method can be used immediately. Normally there will be sparks caused by the short circuit! 3. Check the output voltage of the yellow and black igniter wires. You can also use the instantaneous short circuit method. Normallynt, there is sparking caused by a short circuit. Check the igniter, disconnect the black and white wires, and check the spark plug for spark. The black and white wires are the wires from the dead light switch to the power door lock. When the electric door lock leaks, the igniter does not come out. high voltage. 4. The input wire of the high voltage box is the yellow and black wire. If there is voltage in the yellow and black wires, remove the high voltage cap and check for sparking in the high voltage wire. the normal distance between the high voltage wire and the motor shell is 0.5-0.2cm. Sparks appear when starting the machine.