To Fix. A disconnected vacuum or air hose will inevitably cause a vibration. It’s a 2002 quattro audi all wheel drive I changed the ball joints and the whole arm i.t had made a big difference when acceleration it’s applied but still still shake a little.. was wondering if a bad alignment could mark make this happen, there shaking was both sides but after replacing control arms it’s way better bit right side still shakes. Simply change the faulty mount with a new one to stop the shakes or vibrations. When the engine misfires, you may have trouble getting your vehicle up to speed. 11 Reasons Your Car Shakes When Accelerating. Does the vehicle only vibrate at low speeds, high speeds, or a constant speed? Sometimes the idling starts in the middle of the highway at high speeds and other times its right when I start my car. Is it only at idle? when i accelerate it doesnt run smoothly. Sluggish or rough acceleration. It does not matter if the vibrations come after you accelerate, while in motion, or if the car is idle. If your car only shakes while braking, the cause could also be different. I’ve noticed that it typically happens around 1500 rpm. When I’m accelerating sometimes my car will shudder or shake, seems like it’s coming from the engine area. At idle, at least temporarily, you might experience car shaking at idle, as well as poor acceleration. I thought maybe it was the tire going flat, then thought that maybe it was BC we were running low on gas and maybe ktnwas running out. Your car shakes every time you stop, but you definitely don’t live near an earthquake-prone area! It happens more often when I’m traveling uphill, but it sometimes happens in regular conditions. Vacuum leaks is considered the primary cause of engine idle vibrations. Car shakes when accelerating and idling may be as a result of faulty car mount. We put gas in, went inside the store, left about 1 1/2 later and went about 8 miles before it started the same thing. Vibrations have a habit of creeping up on you. I checked to see if the air intake has any cracks but it is fine. You feel them, you ignore, and one day you wonder how simple things become critical. Though the car shakes when on idle, but it becomes more pronounced when accelerating on speed. Solution: Replace the air filter. what - Answered by a verified Auto Mechanic. My car shakes occasionally (when idle and accelerating). After the car sat for some time and I started it up, it was shaking quite a bit. The greater the load (vehicle is in operation), the less the vacuum. No good news should be expected when your vehicle starts to vibrate. Here is a more detailed list of the most common causes when a car shakes when accelerating. The most common causes when your car shakes when accelerating are unbalanced wheels, bad cv-joints, bad driveshafts, bad engine mounts or engine issues. This can result in slow or sluggish acceleration or a jerking motion while pressing down on the accelerator. When I stop the car at traffic lights, the issue occasionally gets so bad that I have to restart the car. My car is shaking when I accelerate between 40 and 60 but if I let off the had it stops. Noticed a shaking when I accelerate. Unfortunately, continued operation would likely lead to air filter collapse, which would solve the idle and performance problems but allow totally unfiltered air into the engine, which can increase wear. A car shaking when driving can often mean something different than a car that vibrates when stopped so you’ll want to pay attention to when the shakes are happening. Paying attention to when, where, and how your car shakes can help diagnose the issue. The reason is that the intake system is meant to hold up more air when the car is idle than when the vehicle is operational. While a shaky idling car can certainly feel like an earth-rumbling tremor, it can also indicate a problem with the engine. My car shakes when it’s idling. Every once in a while when I turn my car on it starts shaking and when I start driving, it is as if the car lost half of its acceleration power. Hi. Misfires often happen when your vehicle is under load while accelerating. It has difficulty accelerating and idles roughly. My car shakes when idle and there seems to be a rumbling from the engine.