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In cases such as DIAPHRAGM tearing, cracking, there will be gas leakage to the manifold, causing choking and a late start problem at the end of the long cranking at the first start. Therefore, it is useful to check the regulator diaphragm. As I explained in the video, after stopping the vehicle, remove the pipe going to the manifold on the regulator and put the pipe back before starting the vehicle in the morning. If the vehicle starts directly with the first start, you can understand that the problem is with the DIAPHRAGM. If the vehicle stops when switching from gasoline to LPG and does not start in LPG, if there is no problem in the settings, it may be caused by the regulator, namely the diaphragm failure and the temperature sensor failure on the regulator.