After installing my sway bar, i began taking on/off ramps like a mad man. But while in the middle of the ramp (circular ones) my check engine light comes on. I pull over, kill the engine then restart it. The light stays off after that. I have no clue what could have caused the light to come on. Anyone have any ideas?
This second time the light came on, i drove on it for a bit. I downshifted, and the car had no power. I'm wondering if i just need maintenance.

any help would be great!
thanks.