I was driving home and my car started to act weird all of the sudden. I would be driving along at about 40 mph and it would suddenly start to feel sluggish and dragging so I'd give it a little more throttle and it stumbled and still felt funny like the bottom end power was gone. It felt like it kept misfiring. The higher rpm's still felt fine though. So then I gave it like half throttle and the engine light came on. It's been coming on when I did similar things earlier like giving it a lot of throttle at a lower rpm but it has never felt weird until today. I looked at the ECU and it was a steadily blinking red light that blinked once about every 1 1/2 seconds. Can someone help diagnose my problem please.