CAR STARTS AND RUNS GREAT NO NOISE ETC,HOWEVER WHEN I COME TO STOP IT MAKES A HUMMING SOUND.ALSO IF I PRESS THE BRAKE ON AND OFF AT STOP THE CAR HUMMING GETS LOUDER AND THE CAR SURGES.PS WHEN DRIVEING DOWN THE ROAD NO ISSUES ONLY WHEN I COME TO A RED LIGHT OR STOP SIGN. I CAN CRANK IT UP IN THE DRIVEWAY LET IT RUN NO MISSING OR HUMMING. THS GOT ME PUZZLE