Hello Everyone. So I have a 2006 Nissan Altima 2.5S, when I wake up in the morning to warm it up it is not blowing hot air it’s blowing cold air, but when I drive it on the highway it starts gives me a really good heat. What could be wrong so I can fix please.

Hi everyone. I have a 2004 sentra s model 1.8l. 2 days ago my engine started to sputter. It starts up just fine. Accelerates just fine. No misfire at all. No hesitation in engine. Then after about 10 to 15 minutes it will start to sputter and shake engine. If I let it sit until it cools off it...