[nogoodscallywag]

hello. i drive an 03 cavalier. just installed new battery a month ago. When I start my car, the temp outside may be 20 or it may be like 55. either way, the engine revs way up to 3000rpm then idles back to normal. one time the engine actually died but then after a third try the car started. i have no idea and cannot figure out why the car revs so high. anyone have this problem?

thanks