phenomenon: The Nissan engine gasoline status starts normally, and the LPG status starts difficult to start. analysis: 　　 1. LPG gas in the gas cylinder is insufficient; 2. LPG pipeline leaks; 3. The pressure reducing valve is damaged; 4. The mixer piston is stuck; 5. The vacuum signal is insufficient. solution: 　　 1. Check if the gas in the LPG cylinder is sufficient; 2. After the engine LPG state is started, spray the LPG pipe joint with foaming agent to check if there is air leakage. 3. The diaphragm inside the pressure reducing valve is damaged, resulting in failure to decompress normally, so that the concentration of the mixed gas is too high, so that the engine is not well started, and the pressure reducing valve can be disassembled to check the diaphragm; 4. Due to the harsh working environment of the engine and the large dust, in the engine running condition, the dirty things with dust and sand are sucked from the mixer, causing the internal piston of the mixer to run unsmoothly or jammed; The device is not working properly, so the engine is difficult to start, and the repair kit can be cleaned or replaced; 5. The vacuum signal tube is detached, causing the filter to fail to take the vacuum signal, so that the filter cannot be opened. V Ribbed Belt,V Ribbed Drive Belt,Ribbed Belt V,Ribbed Drive Belts Acron Power Transmission (zhejiang) Co.,Ltd , https://www.acronpower.com