The other day on my way to work my car started acting like it has a misfire. But I'm not showing any misfire codes. The car shakes at idle and the boost needle on my prosport gauge bounces while idling. When I press the gas pedal down it mildly shakes till about 3k Rpms and then drives fine. I replaced the spark plugs, new maf sensor, new fuel pump, new fuel filter, reset the ecu, and nothing has helped.. If anyone can help, I'd appreciate it.