on friday mourning i got in my car, 83 scamp, t2 and auto. i started it and while warming it up i looked down and saw check engine light on. it was about 20 deg outside but seemed to run ok. turned car off and restarted it and warmed her up some more and went to work, no light on at all. went to lunch no problems, no light. got in it after work and temp had dropped outside to about 30 deg, well started car and the light came on again. shut it off and resarted and drove home with no light on. took it out sunday no light and drove to work this am and no light on? anyone have anything like this going on? outside temp have any bearing on this? i am running MP stage 2 computer and +20s. i have allways had a wierd up and down idle for a couple of mins while warming up car even when it is not cold outside but as soon as engine runs for a min or two it is perfect and runs really strong. i have not had much time to look at it so shoot me some ideas, i want to check it out tonight.