What causes the Honda Dio to idle but not accelerate when starting cold?

[Levi]

Honda Dio's inability to accelerate while idling during cold starts is due to low cylinder compression. Other possible causes: Leakage in the intake system; Fuel pressure too low; Clogged air filter; Faulty coolant temperature sensor; Malfunctioning air flow meter; Idle control valve or auxiliary air valve failure; Cold start injector not working; Fuel injector leakage; Incorrect ignition timing; Open circuit in the wiring from the starter switch to the ECU. Solutions: Check battery condition; Replace with appropriate engine oil; Replace spark plugs in a timely manner. Engine maintenance tips: When starting the engine in cold conditions, it is necessary to warm up the engine properly. At normal operating temperature, the engine's components operate with optimal resistance, wear, and stability, making warm-up essential. Avoid overloading the engine—keep the RPM below the red zone on the tachometer during driving to prevent excessive strain. For manual transmission vehicles, avoid lugging the engine.