Skip the auto shop - Our mechanics make house calls

Q: My 2003 Town Car is showing that the 8th cylinder is misfiring. Do I have to replace the ignition coil as a result?

asked by on

The engine is hesitating on acceleration and the check engine light has come on. I had it checked by Auto Zone and the code indicated that the 8th cylinder is misfiring.

My car has 96848 miles.
My car has an automatic transmission.

Hi, thanks for writing in. A misfire code only says the cylinder is not contributing to power in the motor. You may have no or low compression, a bad coil, injector problems, or a plug problem. Have the coil removed and swap it with cylinder to see if misfire moves to the other cylinder. This is a simple test to see if the coil is bad if you do not have a spark tester. Or just use a spark tester and replace the coil if it is not working. You may need to clean the injectors and clean the combustion chambers of carbon build up on valves. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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. My 2003 Town Car is showing that the 8th cylinder is misfiring. Do I have to replace the ignition coil as a result?

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: Ignition fuse keeps blowing

You had a good start by tracing the wires and making sure they were clean, dry, and not damaged. To make sure you covered the entire circuit, I recommend you use an official wiring diagram to check this. It is...

Q: How much does it cost to replace ball joints on Cadillac deville?? My car is making a cranking noise on the right side when I turn

Hi there. Although you could request a ball joint replacement quote here, it's probably a good idea to have a professional mobile mechanic come to your location and complete a car is making a noise inspection first. This will allow...

Q: Blown engine in a 1999 Lincoln town car

Hi there. Unfortunately, our mobile mechanics are not able to complete engine replacement services, so we would be unable to offer you an estimate for this service. Generally speaking however, a replacement engine that has been refurbished by a professional...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...