Skip the auto shop - Our mechanics make house calls

Q: After you sit with the car running, the car starts smoking and eventually starts shaking

asked by on

I start the car, car runs fine after awhile and after I park the car and sit with the car still running, it seems as if the engine starts shaking and after awhile starts smoking! Is it overheating? What could be the problem?

My car has 110000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. It all depends w...

Hi, thanks for writing in. It all depends where the smoke is coming from. If it is from the exhaust then your engine be running rich and starting to foul out the spark plugs. Have the computer tested to see if any codes are present that could indicate what is causing the smoke. If you see smoke from the engine compartment then you may be running the engine hot due to low airflow over the radiator. Have the cooling fan checked to make sure it is running. If it is running and the vehicle has the AC running and the blower is on or near high then you may be using more energy than the alternator can keep up with. This can cause the radiator fan to not turn as fast as it should and let the temperature to rise if idled for long periods. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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!

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: Car pulling and jerking

Your vehicle may be out of alignment. Every time you hit a hard bump in the road, the alignment gets slightly altered, in most cases you won't even notice, but eventually it will become out far enough that you can...

Q: Wheel well guard rubbing against tire

It's possible that there is damage that is unnoticed behind the wheel or something may be loose, which is causing the shaking while driving. It could also just be that a wheel weight fell off. Either way, I would recommend...

Q: Gas cap loose and check engine soon light comes on

Hi. In some cases I have seen that after market gas caps do fix the engine light for the gas cap. I suggest you try getting a gas cap from the Buick dealership and have the engine light reset properly....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.