Skip the auto shop - Our mechanics make house calls

Q: Undriven car's battery started, but ran rough

asked by on

My car wasn't started or driven for 2 months while it sat in the garage and naturally the battery died. I jump-started it and it started just fine. But then once it was started it was running rough, like it was missing. Do you think the gas has gone bad or would it be something different?

Hello there,

When vehicles sit for long periods of time like this a few things can happen. The battery can drain, the fuel can lose its octane rating, and oil can pool in the cylinders.

If the vehicle is misfiring you may be on the right track with bad gas. A qualified technician, such as one from YourMechanic, will be able to diagnose your rough running symptoms and perform any repairs required to get your car running smoothly again.

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 is the price to replace Porsche Panamera camshaft adjuster aluminum bolts

Hi there. Unfortunately, this is not a service our mobile mechanics offer. I would highly recommend contacting a local Porsche mechanic to dealer to request a quote for this type of service.

Q: I did a diagnostics test and the code was P0562. The fan stays on, what can I check to fix the problem?

Hello. P0562 is the trouble code for low system voltage. If the computer detects that the overall electrical system's voltage is low, it will set off the Check Engine Light to notify the driver of the issue. The most common...

Q: My truck cuts out and jerks when lightly applying accelerator at 45 to 60 mph. If I gas on it hard it doesn't do it

It sounds like you may have either a failing throttle position sensor or potentially a dirty or faulty mass air flow sensor, both of which can cause a bit of a jerking reaction when not functioning properly. The mass air...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...