Q&A

This started about 3 weeks after the "Check Engine" light came on. I haven't gotten chance to go check out what the code it's throwing. The engine rev at around 900 rpm during idle, I frankly haven't own the car for long enough to remember what it used to idle at.
Basically I start the car, and if I leave it idle it would stall after less than 1 minutes. Also when I am cruising down the highway, it would occasionally jerk a little as if it's losing power? (but I didn't really lost power).
When I came to a stop light, and try to go again, the engine seems like it was going to stall, but fortunately it didn't.
I am taking it into a shop to check it out, but would love opinion as to what may be wrong with it.