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Q: Cold Starting Problems

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When starting the car in cold weather, it turns over fine and starts, but dies unless I hit the gas at the same time. Shortly thereafter, the lights may dim briefly at a light or idling at a stop sign. Once warm, this isn't an issue. Feels like the car is missing a beat or something while driving.

My car has 130000 miles.
My car has an automatic transmission.

Hi There, When you start your vehicle in the morning and turn the key to on, the coolant temperature sensor reads the temperature of the coolant and relays this to the computer indicating that the coolant is cold. The computer then knows 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 or cold start valve 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.

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