It got really cold out here the other day, 0 degrees actually. I left my car outside, when i went to start it, it did something kinda weird. First time I had seen this, it revved its self up and then down over and over, then it just stopped after about 5 mins. Wondering if this was computer controlled cause it was so cold, or maybe it froze something to make it rev.

 

it's normal.

 

Searching would def show that this is normal!

 

the car is trying to warm itself up