Skip the auto shop - Our mechanics make house calls

Q: Ignition coil

asked by on

The engine is trying to turn over, and it sounds as if its almost there, but it never catches. Battery seems fine. I did manage to get it started once, but then it died right away. Maybe fuel filter/fuel pump? I did, earlier this week, have an episode where the car was acting mildly as if it had a clogged fuel filter.

My car has 189000 miles.
My car has an automatic transmission.

Hi There, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations under the hood which ultimately cause them to shut down causing the car to only run after cooling down for 30-40 minutes. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close when cooled. When open, they allow shorting of coil windings and decrease or eliminate the coil’s ability to function. This process will repeat itself continuously until the coil ultimately fails completely and must be replaced. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your ignition system.

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: Door sensor

The door switch is located on the driver's door latch. Try to lube the door latch first to see if it is binding. If it is binding, then you will most likely need to replace the latch and switch at...

Q: 04 pontiac grand prix car wont start

Hi Joe. Thanks for writing in today. In most cases, when you turn the key and nothing happens, it's due to a faulty starter relay, damaged starter, ignition relay or ignition cylinder that is damaged. Unfortunately, there really isn't a...

Q: How would I reset the ECU or the NON-OEM SO the key would work

Hi Shakaira. The ECU would need to be reprogrammed by a Ford dealership. If you have a non-OEM key or ignition system, it will be difficult to have it link to the ECU. You might want have a professional mobile...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.