Vehicle stalls when started, after vehicle is up to temp the rpms fluctuate and vehicle misfires. I was driving down the road when all of a sudden the car went into limp mode I couldnt do anything and me and my son almost got run off the road but after a few minutes of pressing the gas pedal it finally started to move. Dealership is unable to fix problem because they cant even figure out what it is $7000.00 later and no one can figure out the problem. This is a lemon and Chevy should be recalling all Chevy spark before someone gets hurt.