Q: My car is shaking and I just changed my spark plugs

asked by on June 19, 2017

My car is shaking and I just changed my spark plugs

My car has 216386 miles.
My car has an automatic transmission.

Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than normal. This creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing. Anytime a misfire is caused, this causes an imbalance in the motor which will cause the motor to shake or vibrate. Other issues that may cause this type of shaking or vibration might be broken engine mounts or potentially tires that are out of balance or worn improperly. Engine mounts are generally rubber mounted braces that hold the engine in place to the chassis of the car. When these break or become weak or faulty, this may cause the engine to vibrate heavily. When tires are out of balance, as the speed of the vehicle increases, the vibration will become much more noticeable and pronounced. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle using a scanning tool which will more accurately indicate what specifically may be causing this.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

I drives Toyota corella S 2005 model.My check engine light is constantly on and I noiced there i

If the spark plugs have not been changed in 85K miles, then I suggest putting in new spark plugs. Also, you would need to put a fuel injection cleaner in the fuel tank to help clean out the fuel system...

After installing new spark plugs they soot up after 70 miles

High mileage engines leak oil into the combustion chamber through worn out valve stem oil seals, worn valve guides and ill fitting piston rings. If a substantial amount of oil is entering the combustion chamber the plugs will quickly foul....

Damage to car after hitting curb.

Its likely that something is bent and should be checked on an alignment rack by a certified mechanic. Another likely possibility would be a plastic splash guard that came loose in the incident. Have this problem inspected and diagnosed for...

Car overheating after radiator leak

Coolant leaks can originate from many places other than the radiator. I suggest you have a cooling system pressure test performed on your vehicle. This test uses dedicated equipment to pressurize the system and pinpoint any leaks. I recommend having...

Prius is entering its second decade -- what to watch out for?

The battery is a lithium battery just like the rechargeable batteries you buy except better quality. The warranty on the battery is 8 year 80,000 mile warranty on most years of the Prius. The replacement battery may be coming down...

Brakes catch first thing

For an issue like this, a certified mechanic will need to inspect the vehicle and determine exactly where the problem is located. However, it sounds to me like you have a problem with a sticking caliper or a fluid leak....

Smelling has while driving

This could be many possibilities such as a fuel leak, or a problem with the air/fuel mixture (i.e. running to rich) which could be a result of many possibilities. I would suggest having a certified expert, like one from YourMechanic,...

Car won't start, engine ticking

Hello. It sounds like the battery is weak and does not have enough power to start the car. Even though the lights come on in the dashboard, it does not mean that there are enough volts for the battery to...

Loud clicking noise from top of engine and oil leaking after driving

Hi there. The oil leak needs to be found first. If it is leaking a lot of oil or if the oil filter is leaking, then the low oil level will cause these symptoms. Once the oil leak is found...

Related articles

A Buyer’s Guide to the 2012 Toyota Sequoia
If If you need to haul a crowd and you want the power needed to haul all the toys as well, the 2012 Toyota Sequoia might be a perfect fit. While it doesn’t have the hauling capacity of some of...
A Buyer’s Guide to the 2012 Toyota Camry
America’s America’s best-selling passenger car for over a decade, the Toyota Camry is highly reliable, comfortable, and gets great gas mileage. It’s now available in a four- or six-cylinder engine, as well as a hybrid option, and it continues to...
The Best Used Cars to Buy for Towing Light Loads
Towing Towing is tricky business and depending on the weight you’re dealing with, it really determines what vehicle is best for you. If it’s light loads you’re looking at towing, we’ve put together a list of the top five cars...