When your vehicle check engine light blinking, shaking and vibrating when accelerating, it can be an alarming event and is a sure indication there’s something amiss. And as soon as possible fix that issue and don’t try to speed up your car in this situation.
Common Causes of Check Engine Light Car Shakes When Accelerating
1. Malfunctioning Cylinder
When the cylinder does not work as expected or it does not pass the fuel and air every time the crankshaft turns, it misfires. As a result, the engine runs rough and it makes the overall car shaking.
2. Spark Plugs
Spark plugs driven for more than 80,000 miles need to be replaced, this is another reason for car shaking while acceleration.
Coils are responsible to produce the spark that the cylinder needs to fire whenever the crankshaft happens.
If you need more information about what other reasons for car shaking with engine light on then a complete article of about car shaking/vibrating and engine light on/blinking.
4. Faulty Intake Manifold Gasket
Gaskets work as a seal and when the seal loses its ability, it makes the engine to overheat. Other than an overheating engine, if you can smell the coolant leak, it is a symptom that there is something wrong with the gasket.
Reason for Shaking Without Check Engine Light Blinking
1. Rear Driveshaft and U-Joints
Remove the driveshaft and feel the joint’s movement. Any rough patches there will be magnified when the engine runs with power.
2. Bent Axle
Even the slightest bend can be the reason for serious shaking, especially when the car speeds up. The surprising fact is even a minor fender-bender or a small bump in the road can lead to the twisting of the axle. Sometimes, the problem could be the result of a worn out CV joint that you will find at the end of the axle.
A loose tire not only causes vibration but can also lead to major accidents.
Unbalanced tires could be another source of shaking. Tires that are out of balance or misaligned due to worn out tread or bad installation won’t let the vehicle to run straight on the road.
4. Steering Wheel
Tires are fine then you have to go for steering wheel, Loose or damaged wheel bearings could give your vehicle a good shake at higher speeds, however these parts are unlikely to wear out with time, it’s not impossible. So remember these when your car vibrates when accelerating. You may find damaged bearings in cars that have been driven extensively for many years.
5. Stuck Brake Caliper
Not often, but could be the one for shaking while acceleration at a speed of 45 mph or more.