Car Shakes When Accelerating

Shaking when you step on the gas puts you on edge — especially if it gets worse with speed. Something in the drivetrain or engine isn't happy.

A car that shakes under acceleration has a different problem set than one that shakes at idle or during braking. Worn or damaged CV axles are the leading cause — a bent axle shaft or worn inner CV joint creates vibration that intensifies with speed. Broken motor mounts let the engine rock excessively under torque, transferring vibration to the cabin. Misfiring cylinders from bad spark plugs, failing ignition coils, or clogged fuel injectors cause the engine to run rough, which feels like shaking under load.

Bent wheels or damaged tires also cause speed-dependent vibration that can feel like it worsens during acceleration. A separated tire — where the belts inside have shifted — creates a wobble that gets violent at certain speeds. Loose or worn suspension components like control arm bushings allow excessive movement under acceleration forces. Diagnosis involves a visual inspection of axles and mounts, a spark plug check, and often a test drive to correlate the vibration with speed vs. RPM.

Our mobile mechanic service reaches every corner of Jacksonville, FL. If your car shakes when you accelerate, call (904) 788-7272 and we'll come to you. We'll test drive it, get underneath with a flashlight, and tell you exactly what's causing the vibration — then fix it on the spot if possible. No tow truck, no waiting room, no hassle.