What is the reason for the inability to accelerate when the engine is warm?
2 Answers
The reason for the inability to accelerate when the engine is warm is due to a malfunction in the vehicle's electronic throttle. The electronic throttle replaces the traditional throttle cable or linkage with a wiring harness (conductive wires). A micro motor is installed at the throttle valve, which drives the throttle opening, known as drive-by-wire, replacing the original mechanical transmission mechanism. Here is additional information: 1. Electronic Throttle Control System: The electronic throttle control system mainly consists of the accelerator pedal, pedal position sensor, ECU (Electronic Control Unit), data bus, servo motor, and throttle actuator. The position sensor is installed inside the accelerator pedal to continuously monitor the pedal's position. 2. Benefits: Since the electronic throttle system adjusts the throttle through the ECU, it can incorporate various functions to enhance driving safety and comfort.
The issue of the car not accelerating properly when it's hot is something I often encounter, and it could be related to several common faults. When the engine is hot, the high temperature can cause problems with the fuel pump. If the fuel pump isn't supplying enough fuel, you won't get the power when you press the accelerator. Another common issue is a clogged fuel system, especially if the fuel filter is dirty or the fuel lines are old, as heat expansion can make the clog worse. Ignition system faults are also a possibility, such as excessive carbon buildup on the spark plugs or leaking ignition coils, which make the engine more sensitive when hot, preventing the RPM from increasing when accelerating. Carbon buildup in the engine is another hidden danger, as it can soften and clog the intake valves when the engine is hot, affecting air intake. Sensor issues, like incorrect signals from the coolant temperature sensor, can cause the ECU to miscalculate the fuel injection. It's recommended to first check the spark plugs and fuel system yourself. If that doesn't help, take it to a professional for diagnosis. Regular oil changes and carbon cleaning can help prevent these issues.
