Skip the auto shop - Our mechanics make house calls

Q: jolting bad and stalling - 2009 Kia Sedona

asked by on

I just changed the spark plugs yesterday and today trying to leave for work when I started up the vehicle i would jolt really bad and eventually shut down/stall. After 10 minutes I finally got it on the road but it was still jolting. When I would slow down it would stall, then at every stop sign it would take me a few minutes to get it going again, after stalling over and over.

My car has 142000 miles.
My car has an automatic transmission.

A: Hi there. There are a variety of possibilit...

Hi there. There are a variety of possibilities that could cause this. However, there are a couple of sensors the car has that are most commonly known for causing this kind of problem. A faulty mass air flow sensor is a sensor that regulates the amount of air that flows into the car's engine allowing it to mix properly with the fuel just before being injected into the motor.

When this is not working correctly, it causes misinformation to be relayed to the fuel injection system in your car resulting in the erratic jolting you are describing. A bad throttle position sensor can also cause the same type of response. This is a sensor that monitors the position of your foot on the gas pedal which then relays this information to your car's computer as well to tell the fuel injection system how much fuel to give the motor. If you need further help with this, a certified technician from YourMechanic can come to your car's location to diagnose the stalling issue and assist with proper repairs.

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・Save up to 30%

Get a quote

What others are asking

Q: What causes my vehicle to vibrate and stall out while driving?

Hi there. This sounds like there is a major vacuum hose or line that split or came off while you were driving the vehicle. Check the engine compartment for any vacuum hose or line that could have came off or...

Q: Heater not working and car says its overheated but it isn't hot

Hi there, thanks for writing in. I'd be happy to help. This is a common characteristic of a car that has a cooling system problem. The flaw in the cooling system may be related to low coolant levels, a plugged...

Q: Air bag light has been on for about 2 months

Hi there, thanks for writing in. I would recommend having an expert from YourMechanic come to your home to diagnose as a second opinion or to find any possible alternatives to correct this. There is a good chance this can...

Related articles

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...
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...
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.