A couple weeks ago I was driving and the cars idle started dipping pretty bad; it almost wanted to die and the check engine light went on. I parked it to the side and let it idle. After awhile the idle started to stabalize and the next day the light went off. Everything went great until last night it started idling wierd again and the light came on, so I pressed in the clutch and the car died. It wouldn't start at all for about 30 minutes and then it started fine.It would crank and the rpms would start torise and then it would die. I'm not sure if it's the spark plugs, or what?It's pretty cold here, I'm not sure if that has something to do with it. All the times the light came on were when I didn't let the car warm up at all. Thanks for the help.

ps 97 Audi A4 1.8t

 

go get the fault code and post it here