Skip the auto shop - Our mechanics make house calls

Q: Stalls and stutters only in the morning when I start it

asked by on

My cars sounds like it's about to cut off, then after like ten min it starts idling correct. This only happens in the morning, throughout the day the car runs fine and starts fine. Why is that?

My car has 105789 miles.
My car has an automatic transmission.

As a general rule, car engines do not like cold weather and do not do operate as well in cold weather. When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately reads the temperature of the coolant and relays this to the computer indicating that the coolant is cold. The computer then knows at this point that it needs to enrich (add more fuel) the air/fuel mixture at startup due to the change in air density. When you start the car, you will notice that it idles high for a period of time until the engine warms up. This is the enrichment cold start process. This is done with what is called a cold start injector which injects more fuel into the motor until the engine reaches a specific operating temperature. The computer simply feeds a little extra gas through the fuel injectors to start the engine and then maintains a certain amount of fuel supply to the motor until it is warm. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle and diagnose your cold start issue.

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

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: My car had a hard time starting. 2008 Suzuki SX4

Hello. Depending on how hard the starting was would help me to determine what is going on. If the engine just had a hard time cranking then it may be a problem with the battery or the starter. It may...

Q: If Im planning to go to the snow what are some key things I should do to my car?

Hi there. Before going on the trip, the car should have snow tires or chains to eliminate any possibilities of your car sliding. Also, the vehicle should have fluids specialized for the cold temperatures that will be encountered. If any...

Q: Need an oil change

BMW high performance synthetic 5w40 or 5w30 or equal weight synthetic oil will be best for your car. A certified mobile mechanic from YourMechanic can do an oil change at your home or office.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...