Skip the auto shop - Our mechanics make house calls

Q: Car hard to start and idles rough

asked by on

My car idles rough and is hard to start sometimes.

A rough idle will usually indicate that the engine isn’t running at its peak efficiency, and needs some attention. The hard start condition will also suggest that the engine isn’t running its best. The things I would look into would be fuel delivery, ignition components and engine compression. Have a certified mechanic, such as one from YourMechanic, test your fuel pressure, inspect and test ignition components, and do an engine compression test to diagnose your rough idling issue.

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: Sensor problem? Transmission overheating

Hi there. Your Focus has what is called a dual-clutch "automatic" transmission. Mechanically, it is a manual transmission with 2 clutches and servos, and other electronics used to handle the clutches and shifting such that it acts like a classic...

Q: Exhaust making noise.

You may need a new exhaust manifold that got warped or cracked. The pipes that connect to the manifold are known to rust out and break the manifold bolts.

Q: How do I adjust the seats in a vehicle?

Adjusting the seats not only improves comfort, but it allows the driver to position themselves to have maximum visibility. There are multiple layouts available for front seats in the vehicle: In a model equipped with either a split bench...

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...
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...
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...