What are the reasons for the failure to switch from gasoline to gas in a conversion system?
2 Answers
When a vehicle fails to switch from gasoline to gas in a conversion system, it is usually due to a malfunction in the conversion system. Check the internal logic circuit of the switch to ensure it is functioning properly, inspect the power supply lines of the switch to guarantee they are intact and connected. Examine the low-pressure outlet solenoid valve of the pressure reducer and its connecting circuit, and verify whether the idle speed node is receiving a signal. Below is more detailed information: Gasoline-to-gas conversion: This refers to a modification method that changes the fuel type of a vehicle, specifically converting a vehicle originally powered by gasoline to one that runs on natural gas. Disadvantages of gasoline-to-gas conversion: There are some drawbacks to this conversion. Due to the lower energy density of gaseous fuels, natural gas vehicles carry less fuel, resulting in a shorter driving range compared to gasoline-powered vehicles.
I've driven a CNG-converted taxi for over a decade, and the failure to switch to gas is all too common. Last week, my car had this issue with symptoms of the engine gasping heavily when pressing the accelerator during the switch. The inspection revealed three key points: the gas pressure gauge showed there was still gas, but the pressure reducer was frozen—this happens most often in cold winters; the wiring of the conversion switch was worn through by the floor mat, causing a short circuit; and the oxygen sensor plug was loose, making the computer think the exhaust was unqualified and directly locking the gas line. A quick fix is to unscrew the pressure reducer's vent screw to discharge ice debris and temporarily secure the wiring with electrical tape. For a long-term solution, the wiring must be rerouted; otherwise, the problem will recur. It's recommended to visit a conversion shop for a complete rewiring.
