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: Engine clicking and shaking

Hello, thank you for writing in. Due to the timing being relatable to the oil change, you will want to start by double checking the repair. Make sure your oil filter was installed correctly and is allowing the oil to...

Q: I change the radiator but i have fault in my car p2568 how can i fix it

Hello. The code you have received is telling you that the downstream oxygen sensor has detected a temperature that is out of range. When the PCM (aka the main computer) detects this error it will set the warning light. This...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...