Rough Idle : If your car's engine idle jumps up and down or makes strange sounds, it could be due to a dirty or damaged throttle body. Rough Acceleration : A faulty throttle body can mess up the air/fuel mixture, leading to uneven acceleration-sometimes fast, sometimes slow. Misfires : Misfires occur when combustion inside the engine is incomplete. A bad throttle body can affect the air/fuel mixture and cause engine misfires. High RPM Idle : An improperly calibrated throttle body may cause the engine RPM to be too high.
Stalling Idle : The throttle body can also cause stalling if it's malfunctioning. Remember, if you notice any of these symptoms, it's a good idea to have your car checked by a professional!