Light Up your car by LED light, lower current consumption, reduce alternator load, so reduce your engine load, so the fuel consumption of your engine also reduce, because the engine load is decreased...
when dis happens my rev feels like a pull back, drop of performance for 1 sec,,,, on dyno machine at each run, it always happens at dat region, thus im not able to pull above dat region, as da a/f ratio fluctuates up...