I am having the exact same problems as Don Hennessy right now!!! My 2013 Spark has been in the dealership several times in the past 7 DAYS! Every time they have it they cannot replicate the problem and blame it on a spark plug. As soon as I pick it up and take it on the highway for 5-10 minutes I have the exact same problem: Immediate loss of acceleration, ridiculously high RPMs to travel 35-55 mph, traction control light on and engine malfunction lamp blinking. Sometimes they stay on for the entire drive and sometimes they disappear. This last time I drove it directly to the dealership unable
