Q: Wont start unless it sits for a while

asked by on

my car starts and If i shut it off I can't get it started unless it sets for hours . I've replaced fuel pump less than a year and just had spark plugs put in as well . It cranks over just fine every time but can't figure out what's going on

My car has 230000 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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Wont start unless it sits for a while

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: The trunk lid wont stay up by its self have to hold it up with my hand. Its a Oldsmobile alero 2004

You will need to replace both of the trunk lid support shocks. They will lose their gas charge over time and will no longer support the lid weight.

Q: I have to run the AC to prevent stalling.

The only thing to say here is to suggest you get the fuel leak fixed before you do anything. No other problems can be looked at till the fuel leak is identified and fixed. I would recommend having a mechanic,...

Q: My power steering pump pulley broke into pieces but pump spins freely, do I just need to replace the pulley?

Hi Bridgett. Thanks for contacting us today. When a pump spins freely as you've indicated, it's usually best to replace the pump, as it's possible that damage has been done to the pump when the pulley broke.

Related articles

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...