I HAVE 2005 CHEVY COBALT THAT RUNS BUT IT WILL STALL WHILE DRIVING OR COMING TO STOP. THERE IS NO ROUGH IDLING IT IDLES GREAT RUNS NICE AND QUIT. YOU DO NOT KNOW IT STALLED TILL YOU STEP ON THE GAS I REPLACED SPARK PLUGS ignition module I HAVE KNOW CLUE WHAT IT CAN BE.
HAS 200,000 MILES ON IT I DO REGULAR TUNE UP. I DONT THINK ITS
FUEL PROBLEM BECAUSE NO CHECK ENGINE LIGHT AND RUNS
SMOOTH NOTHING ROUGH ABOUT IT.