Q: Car randomly stalls out at stoplights, and sometimes won't turn over. If I leave it alone for 20 min, car will start again

asked by on

I have a 2013 kia rio. Manual. My problem is my car is randomly not turning on, sometimes stalling out when I get to stoplights. If I leave it alone for a bit I can turn it on again. When i say turn on, the lights all turn on but the engine wont turn over. There's no check engine light, so far I've changed the spark plugs, air filter, and a new battery. It's at 107,000 miles so far. I've already taken to a mechanic and he couldn't find what's wrong with it. My next step is to either pay for a diagnostic at dealership which I don't want for them to just tell me they can't find anything wrong. Or or see what else is wrong and fix small things myself. Given all these statements, is there anything I havent tried to fix? I'm thinking starter, i 've tried to clean the throttle body with the seafoam spray while running, or fuel pump. Please help!

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. Car randomly stalls out at stoplights, and sometimes won't turn over. If I leave it alone for 20 min, car will start again

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: Brake pedal has very little resistance

From what you've described, I'd advise you to not drive the vehicle and get the brakes bled out. It's possible that you still have a brake fluid leak in this case. I'd suggest having this looked at by a...

Q: i was driving my car on the freeway and it started to decelerate then it died could it be the map sensor or throttle position sens

Hello, thank you for writing in. The vehicle may be having issues with the throttle or its position sensor, the MAP senor, the mass airflow sensor, or the idle air control valve. With that being said, you can remove the...

Q: Q: No throttle response

If the vehicle was severely overheating, the heat could have damaged components including key sensors. At the same time the loss of power is diagnosed, or once there is a diagnosis, obviously the cause of the overheating has to be...

Related articles

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...