What Causes a Car's Throttle to Be Too Sensitive and Frequently Jerk?
2 Answers
It may be caused by a malfunction in the car engine's fuel system. Here is relevant information: Check the fuel line and fuel filter: The fuel line can be understood as insufficient fuel pump pressure. If the fuel pump pressure is insufficient, it will cause poor throttle response. Even if the throttle is pressed deeply, the car may not move because the insufficient pressure leads to inadequate fuel supply for engine combustion, resulting in insufficient power. Check the spark plugs: The replacement interval for spark plugs is between 40,000 to 60,000 kilometers. The performance of spark plugs depends on both their quality and the condition of the fuel. Regardless of the situation, it is advisable to replace them within this timeframe. If one spark plug fails to work, it can cause the engine to misfire (e.g., 4 cylinders operating as 3 cylinders), leading to insufficient engine power.
During car repairs, I've encountered numerous cases of sudden acceleration caused by overly sensitive throttles, which typically stem from carbon buildup or malfunctions in the throttle body. A dirty throttle can cause the valve to stick in unstable positions, sending erratic signals to the ECU and resulting in exaggerated engine response. Additionally, defective throttle position sensors may transmit incorrect data, causing the ECU to miscalculate air demand and leading to unstable power output. Vacuum hose leaks are another common factor, creating uneven air intake that triggers abrupt acceleration. Transmission issues could also be involved, especially when automatic gearbox logic malfunctions cause improper coordination. In such situations, priority should be given to inspecting and cleaning the throttle body, and verifying sensor functionality. For safety, avoid driving in hazardous conditions and have a professional shop conduct comprehensive diagnostics promptly. Don't forget routine maintenance, including regular cleaning of critical components.
