Skip the auto shop - Our mechanics make house calls

Q: Coil misfiring and spark plugs bad.

asked by on

Car will not start after having sat for a long time. I had a mechanic diagnose the problem about six months ago and found out that a coil was misfiring and the spark plugs need replacing.

You may need to have the battery tested. If it sits for a long time the battery can drain from the computer running. If your car is going to sit for long periods of time I would recommend that you put a battery tender on it which will keep the battery charged.

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!
  1. Home
  2. Questions
  3. Coil misfiring and spark plugs bad.

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: Put in spark plugs and car won't start

Hi there. This sounds like a concern I've seen several times. You stated that it sounded like it was sucking in air; a sign that a vacuum hose or hoses have been left or knocked loose. I suggest you go...

Q: My brake pads and rotators are uneven

Congratulations for using the right parts and being concerned about the details, especially when brakes are involved. I suggest you play it safe and have a technician inspect your brake pads and brake rotors. There is no substitute for an...

Q: Misfire and engine reduce power

When there are misfires under full throttle and there are performance modifications involved, the first potential issue to look at is a lack of fuel. You also state there is "no power going to the car when flooring it". I'm...

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...
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 Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.