I HAVE A 2012 CHEVY SONIC LT AUTOMATIC WITH THE 1.8 LITER. THE CAR STARTED HAVING PROBLEMS AROUND 45,000 MILES AND HAS GOTTEN WORSE OVER TIME.THE CAR ON COLD START UPS HAS A GRINDING SOUND. THIS GRINDING MOST OF THE TIME ONLY HAPPENS ON COLD START UPS BUT DOES AT TIMES HAPPENS ON WARM START UPS. THIS SOUNDS LIKE METAL AGAINST METAL AND IT RATTLES. THIS SEEMS TO HAPPEN UNTIL THE CAR IS FULLY STARTED AND RUNNING. I AM GETTING CONCERNED BECAUSE IT IS GETTING WORSE AND LOUDER. *TR
2012
FUEL/PROPULSION SYSTEM
STALLS EASILY AND FREQUENTLY WHEN PULLING OUT FROM A STOP AND IS THEN DIFFICULT TO RESTART, OR I MUST WAIT ABOUT 5 SECONDS BEFORE I CAN ATTEMPT A RESTART. UNEVEN IDLE MOST OF THE TIME. DEALER BLAMES ME FOR THE STALLING (SAYS I'M NOT USED TO THE MANUAL TRANSMISSION, BUT MANY ARE COMPLAINING ON THE ONLINE FORUM WWW.SONICOWNERSFORUM.COM) MOST IMPORTANTLY, YESTERDAY (08/04/2012), THE FULLY WARMED 1.4L TURBO ENGINE IN MY SONIC REV'D TO FROM IDLE (750 RPM) TO EXACTLY 3,000 RPM THEN BACK DOWN TO 750 RPM (WHILE 6 SPD MANUAL IN NEUTRAL, CLUTCH FULLY DEPRESSED, RIGHT FOOT FIRMLY ON THE BRAKE AND NOT TOUCHING THE ACCELERATOR PEDAL. I HAD STOPPED AT THE END OF A DRIVEWAY AND WAS WAITING ON TRAFFIC SO THAT I COULD PULL OUT. MY RIGHT FOOT NEVER MOVED FROM THE BRAKE PEDAL AND WAS IN NO WAY TOUCHING THE ACCELERATOR PEDAL. THE IDLE SPEED INCREASED TO 3,000 RPM ALL ON IT'S OWN AND BACK DOWN TO IDLE, MUCH TO MY SHOCK AND AMAZEMENT. THANKFULLY, I WAS FULLY STOPPED. AT ONLY 3,070 MILES AND NOT YET 3 MONTHS OF OWNERSHIP, MY NEW 2012 SONIC IS BEGINNING TO HAVE A MIND OF IT'S OWN. *TR