Why can't the range extender accelerate?
2 Answers
Possible causes include clogged fuel lines or malfunctioning throttle stepper motor. Here are relevant details: Range Extender: The range extender typically adjusts power generation according to the electric motor's demands. It generates relatively less power on level roads, but increases output during acceleration or uphill driving to meet the energy requirements of electric tricycles when climbing slopes. Function: Since low-speed electric tricycles have limited range that cannot fully satisfy daily commuting needs, installing a range extender can increase their travel distance and operational range. This modification enables round-trip commutes without worrying about power depletion midway through journeys.
Last time I encountered this situation, I found it was an issue with the range extender's fuel pump. The pump couldn't supply enough fuel, and there was no response even when I floored the accelerator. Another common cause is a clogged fuel line, like when the gasoline filter hasn't been replaced for too long, and debris blocks the pipeline, preventing fuel from flowing and naturally causing acceleration issues. Also, check the spark plugs and ignition coils; if ignition is abnormal, the engine won't perform well. A dirty air filter is also problematic—insufficient air intake can affect combustion efficiency. The most troublesome issue is when the ECU program has a bug. I once experienced the system misjudging and entering protection mode, directly limiting fuel and speed. It's recommended to first inspect the fuel and electrical systems yourself. If that doesn't help, quickly connect to an OBD scanner to read the fault codes—safety first.
