For the last couple of months my car has been has been have very minor surges in the RPMs at idle, and when I turn on my A/C it really surges. My check engine light come on when I'm cruising at one speed for an extended period of time, (i.e. highway driving) and then will shut of when cruising around the city. So I can never seem to get a chance to get the codes read because the light does not stay on long enough. Furthermore I'm looking into selling the car this weekend and would really like to get this problem resolved before then if possible, so any help would be much appreciated. Thanks
-Ashton
-Ashton