Skip the auto shop - Our mechanics make house calls

Q: Car runs rough and stalls

asked by on

My car (62000 mileage) is idling, stalling, and rides rough at both low speeds in town and high speeds on the highway. It happens all the time, no matter what the gear, or in park or neutral. The codes that come on and off are the stabilitrak and the cylinder misfire. I'm consistent to get regular maintenance, and I just changed all the spark plugs. In your expert opinion, what does this sound like could be the problem?

A: GM has a TSB which addresses excessive carb...

GM has a TSB which addresses excessive carbon buildup in the intake and on the valves. This can cause uneven cylinder filling and misfire faults as a result. GM recommends an intake cleaning to remove the carbon deposits. It requires a special tool to introduce the cleaning solution through a vacuum port in order to clean the intake system. You may want to enlist the help of a mechanic to assist in the inspection and cleaning of the intake system. If you need help with this, a certified technician, such as one from YourMechanic, can come to your home or office to diagnose your car’s stalling issue and determine what needs repair.

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: What Happens If My Clutch Is Slipping?

Your clutch is what connects the engine to the manual transmission. When a clutch is working correctly, you will get a smooth clutch engagement with little to no chatter. When the clutch is fully engaged, you will have a solid...

Q: Car whines and shimmies park won't engage.

You should go back and check over all the work you did for any loose fasteners, and check your fluids to make sure they are full. It is not unusual to pull a bad part out of a new box....

Q: I hear a creaking/squeak kinda noise when turning my steering wheel

Hello, thank you for the video. If the noise occurs when the vehicle is sitting still like the video shows, then you are less worried about any suspension components, and you want to focus in on the tie rods, ball...

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...
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...