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: On the Downhill Assist Control system, is it supposed to be noisy while in use? 2011 Kia Sorrento

Hello - the Downhill Assist Control (DAC) uses engine compression (without ignition) to provide "braking" without heating up the brakes on a long descent. This makes a somewhat "unnatural" sound much like you describe from the exhaust. It is not...

Q: I poured about three capfulls of engine oil in the coolant resevoir. What will most likely happen?

Hi There, Although, it is not likely that this will do any immediate harm to your engine, oil in the coolant is never a good thing. I would suggest having one of our experts here at YourMechanic come to your...

Q: Q: Engine light coming on

Hello. Code P0446 comes up due to a problem with the EVAP emissions vent system. This system collects evaporating fuel so that it does not get released into the atmosphere. The code almost always means that the vent valve has...

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...
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...
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.