my car running bad a few ago it was not downing at high speeds just rev up if you eased into it would go. now it idles terrible if you can keep it running flooring it would only rev up. And just on the drive home the brakes pedal feels stiff like no power brake and you floor and the car take off i replaced the tps and the fuel filter. But im not replacing part anymore just because i think it might be finally i did get a code 300 random misfire