Skip the auto shop - Our mechanics make house calls

Q: My car shakes violently

asked by on

well my car shakes badly at start up , i've also noticed that my gas has vanished very quickly even thought i've hardly used my car

My car has 115000 miles.
My car has an automatic transmission.

Hello, It sounds like you may have a clogged catalytic converter. This may be a sign of a clogged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When this is clogged, this causes these gases to be backed up into the exhaust system not allowing the engine to breathe properly. When this happens, the engine is forced to work much harder to expel these gases. This often results in the engine bogging down, hesitating, shaking and causing very poor fuel economy. This should also cause a check engine light to come on as the O2 sensors should be reading the incorrect amounts of oxygen in the exhaust gases if this is your problem. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your catalytic converter.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. My car shakes violently

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

Get a quote

What others are asking

Q: ANGEL EYES LED HALO RINGS NOT WORKING

Hello. If they were recently installed and are not functioning then it may be possible that they were not installed or wired correctly. Keep in mind that the halo driving lights are a separate light from the vehicle's regular headlights,...

Q: My 2002 BMW is making a loud high-pitched sound

Hi There, Depending on whether or not the sound comes when the vehicle is moving or not will determine what may be causing this. The following are some possibilities of what could be causing this: -It could be that...

Q: Fuel gauge false readings

Hi. I would recommend having a certified mechanic remove your fuel tank and inspect the sending unit for proper operation. There may be something in the way of the arm that is moving up and down with gas level causing...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...