NHTSA Complaint #11291429 — 2008 CHEVROLET COBALT

INCREASINGLY THE VEHICLE IS NOT OPERATING PROPERLY. THE LIGHTING IS NOT CONSISTENT AND THE SMALLEST ADDITION OF EXTRA FEATURES REQUIRING POWER (EX: USING ONE OR MORE WINDOW CONTROLS, HEATER AND OR DEFOGGER, LIGHTING IN DASH AT FULL CAPACITY, MUSICAL PERFORMANCE, RADIO AND BASS, ETC) WILL CAUSE THE POWER OF EXISTING DEVICES TO FLUTTER OR SURGE FOR EXAMPLE THE HEADLIGHTS WILL DIM OUT WHEN TURNING THE WINDOWS DOWN OR THE VEHICLE WILL BEGIN TO VIBRATE AND SHAKE EVEN MORE ALMOST AS THOUGH IT IS OVERPOWERING AND WANTING TO SHUT DOWN OR QUIT. ALSO THE RPMS WILL FEEL LIKE THEY ARE HICCUPING OR BOUNCING DOWN AND UP MORE THAN USUAL AND AT RANDOM TIMES AND SPEEDS AT TIMES SEEMS LIKE ITS GOING TO RED LINE EVEN IF YOU TAKE YOUR FOOT OFF THE GAS. THIS IS ALSO A BIT OF THE SAME TYPE OF ISSUE BUT IT IS THE OPPOSITE WHEN YOU PUSH THE GAS IT HESITATES OR SOMETHING LIKE THAT GLITCHES OR JOLTS AND GAINS POWER VERY SLOWLY AND HAS A HARD TIME ACCELERATING AND GAINING SPEED (SEEMS GUTLESS?) . AND AT STOP LIGHTS AND WHENEVER PARKED ITS RUMBLES AND SHAKES ALL TOGETHER LET ALONE IF YOU ARE USING THE RADIO OR HEAT ETC IT'S LOUD ENOUGH TO HAVE TO GET THE PEOPLE IN VEHICLE TO ALMOST YELL WHEN TALKING OVER IT OR IF YOU ARE IN A DRIVE THROUGH THE PERSON CAN'T HEAR YOU AND EITHER HAVE TO STUT OFF THE ENGINE OR SPEAK TO THEM IN PERSON AT THE NEXT WINDOW. ALSO WHEN YOU ARE SLOWING DOWN TO STOP IT ALMOST SEEMS THE ENGINE WILL BE FASTER THAN THE BODY OR SOMETHING LIKE THAT (I KNOW SOUNDS CRAZY BUT I DON'T KNOW HOW TO EXPLAIN IT ANY OTHER WAY) . I'VE COME TO THE CONCLUSION THAT IT WILL BE FUEL AND OR ELECTRICITY RELATED OR BOTH. ITS ALSO RANDOMLY SHOWING A FEW DIFFERENT CODES AND THEN SUDDENLY THEY GO AWAY ALL TO DO WITH FUEL PRESSURE OR SYSTER OR EVAP TYPE THING. WITHOUT CLEARING THEM THEY RESOLVE THEMSELVES WITHOUT ANY WORK OR ANYTHING WITCH ALSO SEEMS VERY ODDTO ME. THANKYOU IN ADVANCE FOR READING.