What Causes Acceleration Shaking Between 1500 to 2000 RPM?

[ReidDella]

1500 to 2000 RPM acceleration shaking can be caused by the following reasons: 1. Excessive carbon deposits: Severe carbon buildup in the engine cylinders can lead to clogged spark plugs and valves, directly causing the car to shake at idle. If the vehicle's acceleration performance has significantly declined and the shaking is persistent, consider an engine cylinder cleaning. 2. Fuel supply system malfunction: Unstable fuel pressure can cause inconsistent air-fuel mixture concentration, leading not only to shaking but also unstable idle. First, consider replacing the fuel filter, as prolonged use may clog the filter element. Then, check the fuel pressure bypassing the fuel filter. If abnormal, it might be a fuel pump issue. 3. Worn engine mounts: This is a very common cause of shaking. If the engine shaking worsens over time but the power output doesn't weaken accordingly, consider checking the engine mounts. 4. Misfiring cylinders: This is the most common cause of engine shaking, bar none. The problem lies with the engine ignition coils or spark plugs. If the ignition coils fail or the spark plugs cannot fire for some reason, the car will experience shaking.