Skip the auto shop - Our mechanics make house calls

Q: My engine keeps shutting off what is the problem?

asked by on

My engine keeps shutting off while the car is on, the car also bucks or jerks forward when I put it in drive , the car needed a jumpstart this morning but when I got the battery tested they said it was ok , do you know what's wrong with it

My car has 18567 miles.
My car has an automatic transmission.

A: Hello. Your symptoms lead me to believe the...

Hello. Your symptoms lead me to believe there is an issue with the charging system. If the battery is dead when the vehicle stalls, it means it is either not holding a charge, or the alternator is not generating energy for it. Remove the alternator and take it in to have it tested at an auto parts store. You can also test it at home with a voltmeter. With the meter set to DC, put the red lead on the positive battery terminal and the black lead on the negative terminal. If the battery is being charged by the alternator the voltage reading should be between 13-14 volts. Any lower and the battery is being drained faster than its being charged. Any higher readings means the alternator is putting out excessive energy, and may be damaging the other electronics in the vehicle. Test the alternator and connections first before looking into any type of engine problem.

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: When jump-starting, there is a clicking noise

The first step would be to have the battery and cables tested to see if they are in need of replacement. If the vehicle is not supplying enough voltage, then the vehicle will not start. The battery may supply enough...

Q: when driving speed slow down and resume to speed it begins to jerk i have to put in over drive to resume speed especially on hiway

You should have the vehicle scanned. The data from the speed sensor needs to be checked to see if the transmission or engine is the cause of the jerking. You may have a transmission solenoid that's not shifting correctly, an...

Q: What is a fair value

Hello. A salvaged title generally deducts 20-40% of the Kelly BlueBook value. I would look at kbb.com to determine the fair market value of your vehicle, and then deduct 20-40% dependent on how well it was repaired. Be sure to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.