Skip the auto shop - Our mechanics make house calls

Q: Car was weak starting and would barely go once I tried to drive it.

asked by on

When I started my car this morning it was very weak sounding and took a sec to turn over.... I let it run for a bit before I turned it off.... This afternoon I started it back with the same weakness, like it would hardly turn over.... When I pulled onto the road and gave it some gas it didn't seem t want to go... It just barely went, so I turned around and parked. What could this be?

My car has 151000 miles.
My car has an automatic transmission.

A: It sounds like your battery or your alterna...

It sounds like your battery or your alternator is getting weak. When the vehicle starts slowly and seems to have trouble, this is usually related to a dying or dead battery.

The alternators job is to charge the battery while the engine is running. It is possible that your alternator is not charging your battery and that is why your vehicle does not accelerate very well when you are driving.

I would recommend enlisting the assistance of a qualified professional, like one from YourMechanic, to diagnose your loss of power firsthand. They will be able to come to you and test the battery and alternator using a digital multimeter to determine if the alternator is producing the correct charging voltage. If not, the alternator or battery or both will likely need to be replaced in order to resolve this issue.

Was this answer helpful?
Recommended services
Get a Quote

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My car will not stay charged

Hello. It sounds like something in your car's electrical system is continuing to use power after the vehicle is shut off. This problem can be diagnosed with an ammeter. After shutting the vehicle off, connect an ammeter to the positive...

Q: The ignition cylinder is locked in the On position

This sounds like something is broken in the steering column. A defective lock cylinder, or a seized ignition switch. It would have to be disassembled to see the problem. A qualified mechanic from YourMechanic can come out and diagnose the...

Q: Low power and rough running. Check engine light flashing but no codes at download.

This may be caused by a few different things such as dirty fuel injectors, low fuel pressure or a dirty or failing mass air flow sensor. As you may know, dirty fuel injectors may cause intermittent fuel supply to...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.