What is the reason for the new car not accelerating when the throttle is applied?
3 Answers
The reasons why a new car does not accelerate when the throttle is applied are: insufficient oil pressure, poor oil cleanliness, which can be resolved by replacing the filter element, or it may be due to a malfunction in the ignition system or clogged spark plugs, requiring a check of whether the intake and exhaust pipelines are clear. To improve vehicle acceleration, modifications can be made to the exhaust and engine intake. The essence of modifying the exhaust system is the pressure inside the exhaust pipe, which hinders the force of the exhaust pulse. Reducing backpressure essentially makes the alternation of intake and exhaust smoother, equivalent to extending the valve overlap time. Modifications such as mechanical superchargers and turbochargers fall under the category of intake modifications. A larger airflow air filter can increase the intake speed and enhance the car's power.
After buying my new car, I've also experienced a few instances where pressing the accelerator didn't result in immediate speed increase, almost as if the car was being lazy. This could be because the car is still in the break-in period, and the system needs time to learn driving habits, causing the electronic throttle to respond sluggishly. Or perhaps the eco mode is activated, which limits throttle response to save fuel—many modern cars are designed this way. Sometimes, a dirty air filter can restrict airflow and affect engine performance; an unstable fuel pump causing insufficient fuel supply might also be the culprit. I recommend first checking the driving mode settings and switching to normal mode to see if that helps. If this issue occurs frequently, avoid sudden acceleration attempts to prevent damaging components. It's best to visit a 4S shop for a check-up—new cars are covered under warranty, making repairs simple and cost-free. Remember to warm up the car for a few minutes before driving to allow the system to stabilize.
As a car enthusiast, I often research these issues. It's really annoying when a new car's throttle doesn't accelerate. It might be due to inaccurate signals from the electronic throttle or position sensor, causing the ECU to control improperly and limit power output. Sometimes, a clogged fuel filter can't keep up with the pedal rhythm, or a faulty mass airflow sensor causes intake imbalance. There are also transmission issues like CVT slippage leading to power loss. I've tried restarting the engine or disconnecting the battery to reset the ECU, which can solve minor problems. I recommend checking if the driving mode is set to economy gear. When driving for fun, avoid frequent sudden acceleration tests and maintain regular air filter replacement. During the warranty period, it's faster to take the new car back to the dealership for diagnosis to solve the problem.
