Why Does the BMW Body Shake When Pressing the Accelerator While Stationary?
2 Answers
BMW body shaking when pressing the accelerator while stationary may be caused by engine mechanical failure, engine management system failure, or fuel supply system failure. Engine Mechanical Failure: Such as uneven cylinder pressure in each cylinder; intake system failure: such as excessive dirt inside the intake pipe, etc. Engine Management System Failure: Such as incorrect coolant temperature or intake air temperature signals, wiring faults, etc.; ignition system faults: such as excessive spark plug carbon buildup or incorrect gap, high-voltage wire or distributor cap leakage, damaged ignition coil, etc. Fuel Supply System Failure: Such as injector nozzle not sealing properly or clogging due to excessive internal carbon buildup in the fuel injector, etc.
I've seen many such cases in my daily car repairs. When a BMW's body shakes while revving the engine in place, it's likely caused by aging or damaged engine mounts. Engine mounts are the rubber components that secure the engine to the frame. After prolonged vibration or hardening due to aging, the engine's vibrations are directly transmitted to the body, causing shaking. Additionally, issues with the ignition system, such as unstable spark plug ignition or faulty ignition coils, can lead to irregular engine vibrations and affect stability. Carbon buildup or clogging in the fuel injectors, resulting in uneven fuel supply, is also a common cause. I must remind you that prolonged high revving in place is very harmful to the car. Shaking is not a minor issue, so I recommend taking it to a professional shop immediately to check the mounts, ignition, and fuel system to ensure safe driving.
