What are the reasons why a BMW suddenly does not accelerate when the throttle is pressed?
2 Answers
The reasons why a BMW suddenly does not accelerate when the throttle is pressed: 1. Use of inferior gasoline: The inferior fuel-water separator cannot effectively separate diesel and water. After disassembling the fuel pump, the pump inlet is almost completely blocked by a large amount of impurities, making it difficult for the fuel pump to ensure normal fuel supply to the engine during normal vehicle operation. 2. Intake system blockage: If there is a leak or blockage in the intake system, the car will experience reduced power, inability to increase speed, and body shaking when the throttle is pressed. 3. Fuel injector failure: For example, poor atomization due to injector blockage or injector damage. 4. Problems with the ignition system: Common issues include faulty spark plugs or ignition coils.
I've encountered this situation while driving a BMW—stepping on the gas pedal but the car doesn't move, which is quite frustrating. The main causes could be fuel supply issues, such as a malfunctioning fuel pump leading to insufficient fuel delivery, or a clogged fuel filter causing poor fuel flow. A faulty throttle position sensor can also trigger this problem, as the ECU won't receive the correct signal to accelerate. If the mass airflow sensor is dirty or defective, the engine may not draw enough air, resulting in an unbalanced air-fuel mixture. Issues in the ignition system, such as worn-out spark plugs causing delayed ignition, can also affect acceleration. It's advisable to first check the dashboard warning lights. A simple test is to listen for the fuel pump sound during startup or gently press the gas pedal to test responsiveness. Avoid pressing hard to prevent engine damage—safety first, pull over and call for assistance.
