Q: My car idles very roughly on first start up of the day
Every day on the first engine start up of the day my car idles very roughly as if the engine is about to die and the Rpms start to jump. This used to happen very badly only when it's cold outside, but now it's starting to happen also when it's not cold. To make the very rough idleing stop I have to press the gas lightly until the engine heats up and then it's all good. Once the engine is heated the car drives very good. Very smooth. I have been getting lean fuel mixture codes and misfire codes. I Don't know if this is a bad coil pack or something else. I also recently changed the spark plugs.
My car has 123000 miles.
My car has an automatic transmission.
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