I have a 98 V6 accord coupe, the engine check light came on yesterday and the car feels like it lost some power. Engine is knocking and very unresponsive. It's sort of like a person running out of breath when you try to step on the accelerator. The knocking started today when i step on the gas... don't know what would be wrong with it because two days ago the car was fine. I checked all the plug wires and they appear to be seated properly... help please...