Okay... I have one of those Air/Fuel Ratio Gauges in my car. Recently my car has been acting a little funny and the Check Engine Light comes on. Also, when I take off from a light, sometimes it feels REALLY sluggish and then maybe around 3500 rpm's I feel like the car just breaks loose. As I was driving home tonight, I noticed that my gauge had no reading at all.... When I was at idle however, it would come on and it would display the lowest red it could. Red on the gauge means lean... When i would then take off from the light it would just stop working all together. Now, before it would bounce about and when it was in the red, i could just push the accelerator and it would immediately go to green (rich), but now all i get when i rev from a standstill is still lean.. What could this be? My car used to run really good and now it just feels like it has lost its umph.