hey guys, my x is averaging 10 miles to the gallon as appossed to 30 miles to the gallon. i belive it ties into another problem which involves my electrical systems, in a sense, competing with my engine. when i drive the x at night usually the light are dim and the engine runs ok. but once the light outside the car and in the dash get really bright as if normal, the engine loses power and every time i shift up from a dead stop the car jerks into gear. i really need help with this because its wearing on the motor mounts and who knows what else. so if anyone knows what the problem could be please let me know.