I check spark plugs coil packs and even injectors and it still shows misfires but when it warms up it run great

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. In your Avenger, misfires that only occur when the engine is cold could be caused by several potential issues. Since you've already checked the spark plugs, coil packs, and injectors, the problem might stem from a failing coolant temperature sensor, an air-fuel mixture issue, or a head gasket leak. When the engine is cold, it requires a richer fuel mix, and if the coolant sensor is faulty, it may not provide the correct information, leading to a misfire. Another possibility is that a vacuum leak could seal up as the engine warms, affecting how the vehicle runs only when cold. Getting this issue diagnosed soon could prevent additional damage. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!