Bad Motor Mounts Causing Vibration Shaking Rough Acceleration? : r MechanicAdvice One misfiring plug cause shuddering while accelerating? Let's take a closer look inside your engine's combustion chamberwhere one small component makes a huge difference. Spark plugs may seem simple, but their material and design directly affect your engine's power, Are faulty spark plugs the cause of my car jerking under acceleration? Torque I did an oil change and spark plugs and now my car is shaking at 45 50 mph what could it be ? The spark plugs are gapped and I changed the coils Why Is My Check Engine Light Flashing and Car Shaking?