I was on the way to work this morning, and was stuck behind a very slow moving car. I pulled out to pass him and pushed down on the accelerator pedal, and my car lost its acceleration power and started to run crappy. At this moment, the engine light illuminated and started flashing, I managed after about 10 seconds or so to build up a little speed, and then the light went out and the car started running normally again. I have never seen this before in any vehicle I have ever driven. After I got off work, I drove down to the Advance Auto store and had them try to read any fault codes on the vehicle, but there was no fault code for this flashing engine light. The store clerk told me that it could have been my fuel pump as they do not register a fault code when they go bad. He said it could have been something in my vacuum system sucking up water, as it was raining this morning during my trip to work. He advised me to watch this and see if the problem comes back, or if it was a one time thing. A guy at work said that it could have been the O2 sensor, but I dont know if that kind of trouble leaves a fault code or not. Anyone have any thoughts on any of this?